• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an adaptive analog-to-digital converter circuit (1), preferably for an operating device for operating a light path with at least one light source, wherein the adaptive analog-digital converter circuit (1) an analog-to-digital converter (2), at whose input ( E2) a measuring element (ME) is electrically connected, wherein the analog-to-digital converter (2) is adapted to implement an analog voltage signal dropping on the measuring element (ME) into a digital value having a predetermined number of bits, and a matching circuit (4) comprising at least one electrical parallel circuit (51, 52, 53, 54) of a resistive element (R1, R2, R3, R4) and a switch (S1, S2, S3, S4); an input (E1), to which an analog input voltage signal can be supplied, wherein the matching circuit (4) is electrically connected in series between the input (E1) of the adaptive analog-to-digital converter circuit (1) and the measuring element (ME) such that the input (E1) of the analog-to-digital converter circuit supplied analog input voltage signal at the electrical series circuit of matching circuit (4) and measuring element (ME) drops, and wherein the node (K) between the matching circuit (4) and the measuring element (ME) with the input (E2) of the analog-to-digital converter (2) is electrically connected; and a control unit (3) which is adapted to operate the switch (S1, S2, S3, S4) of the at least one electric parallel circuit (51, 52, 53, 54) in dependence on the input (E1) of the adaptive analog-digital circuit. Control converter circuit (1) supplied analog input voltage signal
    公开号:AT15872U1
    申请号:TGM270/2016U
    申请日:2016-10-28
    公开日:2018-07-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    ADAPTIVE ANALOG-DIGITAL TRANSFER CIRCUIT
    1. FIELD OF THE INVENTION
    The present invention relates to an inventive adaptive analog-to-digital converter circuit with an analog-to-digital converter, which is adapted to convert an analog voltage signal into a digital value of a predetermined number of bits, wherein the inventive adaptive analog-to-digital converter circuit is arranged to convert an analog input voltage signal supplied to the input of the adaptive analog-to-digital converter circuit into a digital value having a larger number of bits than the predetermined number of bits. Furthermore, the present invention relates to an inventive operating device for operating a light path with at least one light source, preferably a light-emitting diode path with at least one light emitting diode, wherein the operating device according to the invention comprises at least one adaptive analog-to-digital converter circuit according to the invention, and a lamp according to the invention with an operating device according to the invention and a Light source path with at least one light source, preferably a light-emitting diode path with at least one light emitting diode.
    2. BACKGROUND
    Analog-to-digital converters are known from the prior art, which are adapted to convert an analog signal, in particular an analog voltage signal, into a digital value.
    In applications such as the control of LEDs by an operating device, in particular the dimming of LEDs by an operating device, a voltage value or a corresponding current value must be determined in a relatively large measuring range with high accuracy, so that analog-digital Translators are needed, which convert an analog signal into a digital value with a high accuracy of eg 12 bits can implement.
    An analog-to-digital converter adapted to convert an analog signal into a digital value with a high accuracy of e.g. However, it is more expensive and expensive to implement than an analog-to-digital converter with a lower accuracy of e.g. 8 bits.
    In the light of this prior art, it is therefore an object of the present invention to provide an adaptive analog-to-digital converter circuit which can implement an analog voltage signal in a digital value with high accuracy and at the same time can eliminate the disadvantages of the prior art described above ,
    These and other objects which will become apparent upon reading the following description or which will be recognized by those skilled in the art are achieved by the subject matter of the independent claims. The dependent claims further form the central idea of the present invention in a particularly advantageous manner.
    3. DETAILED DESCRIPTION OF THE INVENTION
    According to the present invention, an adaptive analog-to-digital converter circuit, preferably for an operating device for operating a light path with at least one light source, wherein the light path preferably corresponds to a light emitting diode path with at least one light emitting diode provided. The adaptive analog-to-digital converter circuit comprises: [0008] a) an analog-to-digital converter, to the input of which a measuring element is electrically connected, wherein the analog-to-digital converter is set up to operate on the measurement to selectively convert a falling analog voltage signal into a digital value of a predetermined number of bits; B) a matching circuit comprising at least one electrical parallel circuit of a resistive element and a switch; C) an input to which an analog input voltage signal can be fed, wherein the matching circuit is electrically connected in series between the input of the adaptive analog-to-digital converter circuit and the measuring element such that the input to the analog-to-digital converter circuit supplied analog Input voltage signal at the electrical series circuit of matching circuit and measuring element drops, and wherein the node between the matching circuit and the measuring element is electrically connected to the input of the analog-to-digital converter; and e) a control unit configured to control the switch of the at least one electrical parallel circuit in response to the analog input voltage signal applied to the input of the adaptive analog-to-digital converter circuit.
    Thus, in accordance with the present invention, there is provided an adaptive analog-to-digital converter circuit comprising an analog-to-digital converter adapted to convert the voltage value of an analog voltage signal into a digital value having a predetermined number of bits, e.g. 8 bits to implement; wherein the adaptive analog-to-digital converter circuit is arranged to convert the voltage value of an input analog voltage signal supplied at its input into a digital value having a number of bits greater than the predetermined number of bits. That the adaptive analog-to-digital converter circuit is thus adapted to convert an analog voltage signal fed to its input into a digital value with a higher accuracy than the accuracy of the digital value into which the digital-to-analog converter can implement an analog voltage signal without the matching circuit.
    This is advantageous because using an analog-to-digital converter with a predetermined accuracy, such as. 8 bits of precision, converts an analog voltage signal into a digital value having a higher accuracy, e.g., as compared to the predetermined accuracy of the analog-to-digital converter. 12 bits can be implemented.
    Consequently, with constant resolution of the analog-to-digital conversion by the adaptive analog-to-digital converter circuit, a magnitude larger analog voltage value range can be converted into a digital value compared to the voltage value range provided by the analog-to-digital converter of the adaptive analogue converter. Digital converter circuit can be converted into a digital value alone.
    A "parallel connection" or an "electrical parallel connection" is understood to mean an electrical parallel circuit comprising a resistance element and a switch of the adaptation circuit of the adaptive analog-to-digital converter circuit.
    A "conversion of an analog voltage signal into a digital value" means a conversion of the voltage value of an analog voltage signal into a digital value.
    Due to the electrical series connection of the matching circuit with the measuring element, the resistance element of the at least one electrical parallel connection of the matching circuit and the measuring element are electrically connected in series and form a voltage divider, the node between the resistance element of the at least one electrical parallel circuit and the measuring element with the Input of the analog-to-digital converter is electrically connected.
    Consequently, at the input of the analog-to-digital converter, the voltage divider from the resistive element of the at least one parallel circuit and the measuring element is present when the switch of the at least one parallel circuit is switched non-conductive, and at the input of the analog-to-digital converter is only the measuring element exists when the
    Switch the at least one parallel circuit is turned on, since then the conductive switch bridges the resistance element of the at least one parallel circuit.
    Preferably, the control unit corresponds to a microcontroller, an ASIC or a hybrid thereof. The control unit is preferably configured to control the switch of the at least one electrical parallel circuit and the analog-to-digital converter in dependence on the analog input voltage signal supplied to the input of the adaptive analog-to-digital converter circuit.
    The control unit is preferably a part of the analog-to-digital converter. Preferably, the control unit corresponds to the control unit of the analog-to-digital converter, which is configured to control the analog-to-digital converter and the switch of the at least one electrical parallel circuit of the matching circuit.
    Preferably, the analog-to-digital converter is a component of the control unit, which is preferably a microcontroller.
    The adaptive analog-to-digital converter circuit preferably comprises a device for detecting the input of the adaptive analog-to-digital converter circuit supplied analog input voltage signal, in particular for detecting the voltage value or the current voltage value of the analog input voltage signal. The detection result is preferably supplied to the control unit for controlling the switch of the at least one electrical parallel circuit and preferably the analog-to-digital converter on the basis of the analog input voltage signal, in particular based on the current voltage value of the analog input voltage signal.
    Preferably, the measuring element corresponds to a circuit having at least one ohmic resistance. That the measuring element preferably comprises an ohmic resistor or a plurality of ohmic resistors which are electrically connected and / or connected in parallel and / or in series. Particularly preferably, the measuring element corresponds to a cascade of a plurality of ohmic resistances. If the measuring element corresponds to a circuit with a plurality of ohmic resistors, then the ohmic resistance of the measuring element corresponds to the resulting ohmic resistance of the entire circuit with the plurality of ohmic resistors.
    The switch of the at least one electrical parallel circuit preferably corresponds to an electrical switch, more preferably a transistor, e.g. a bipolar transistor or a MOSFET adapted to be rendered conductive and nonconductive by the control unit.
    Preferably, the control unit is adapted to control the switch of the at least one electrical parallel circuit in response to the input of the adaptive analog-to-digital converter circuit supplied analog input voltage signal such that the analog input voltage signal into a digital value having a larger number of bits than with the predetermined number of bits can be implemented.
    Preferably, the control unit is adapted to control the switch of the at least one electrical parallel circuit and the analog-to-digital converter in response to the input of the adaptive analog-to-digital converter circuit supplied analog input voltage signal such that the analog input voltage signal in a digital value with a larger number of bits than the predetermined number of bits can be implemented.
    Preferably, the resistance element corresponds to the at least one electrical parallel connection of a circuit having at least one ohmic resistance and / or at least one Zener diode.
    In other words, the resistance element of the at least one electrical parallel circuit preferably corresponds to an ohmic resistance or a plurality of ohmic resistances, which are electrically connected in series and / or in parallel. The resistance element may also correspond to one Zener diode or a plurality of Zener diodes, which are electrically connected in series and / or in parallel. Furthermore, the resistance element may comprise one or more ohmic resistors and one or more zener diodes, which are electrically connected in series and / or in parallel. Alternatively or additionally, the resistance element can also comprise any other electrical component or component which has an ohmic resistance value and can consequently represent an ohmic resistance. Preferably, any electrical component suitable for voltage division may be used.
    If the resistive element of a circuit having a plurality of electrical components, such as e.g. ohmic resistance and / or zener diode, then corresponds to the ohmic resistance of the resistive element, the resulting ohmic resistance of the entire circuit with the plurality of electrical components.
    Further preferably, the number of bits of the digital value to which the analog input voltage signal is convertible depends on the number of parallel electrical circuits of the matching circuit and the predetermined number of bits.
    In other words, the bits of the digital value additional to the predetermined number of bits of the analog-to-digital converter into which an analog input voltage signal can be converted by the adaptive analog-to-digital converter circuit are of the number of parallel electrical circuits of the matching circuit the adaptive analog-to-digital converter circuit dependent. That the accuracy with which the adaptive analog-to-digital converter circuit can convert an analog input voltage signal to a digital value depends on the accuracy of the analog-to-digital converter and the number of parallel electrical circuits of the matching circuit.
    Preferably, the more parallel electrical circuits the matching circuit comprises, the higher the accuracy of the adaptive analog-to-digital converter circuit, i. the higher the accuracy with which the adaptive analog-to-digital converter circuit can convert an analog input voltage signal to a digital value. In other words, preferably, the more parallel electrical circuits the matching circuit comprises, the more bits the digital value in which an analog input voltage signal can be converted by the adaptive analog-to-digital converter circuit.
    Furthermore, preferably corresponds to the ohmic resistance of the resistance element of the electrical parallel circuit, which is electrically connected directly to the input of the adaptive analog-to-digital converter circuit, the ohmic resistance of the measuring element.
    In other words, preferably, the resistance element of the parallel circuit, which is electrically connected directly to the input of the adaptive analog-to-digital converter circuit, and the measuring element to the same ohmic resistance.
    Preferably, the control unit is adapted to control the switch of the at least one electrical parallel circuit based on the analog input voltage signal such that the switch is turned on when the analog input voltage signal is convertible to a digital value having the predetermined number of bits.
    The control unit thus preferably controls the switch of the at least one electrical parallel circuit based on the analog input voltage signal, in particular based on the current voltage value of the analog input voltage signal, such that the switch is turned on, when the analog input voltage signal or the voltage value of the analog Input voltage value can be converted into a digital value with the predetermined number of bits. In other words, if the accuracy of the analog-to-digital converter is sufficient to convert the analog input voltage signal to a digital value, then the switch of the at least one parallel circuit is turned on by the control unit. When the switch of the at least one parallel circuit is turned on, the resistance element of the at least one parallel circuit is bridged by the conductive switch.
    Further, the control unit is preferably configured to control the switch of the at least one electrical parallel circuit based on the analog input voltage signal such that the switch is nonconductive when the analog input voltage signal is unreachable to a digital value having the predetermined number of bits ,
    The control unit thus preferably controls the switch of the at least one electrical parallel circuit on the basis of the analog input voltage signal, in particular based on the voltage value of the analog input voltage signal, such that the switch is switched non-conductive when the analog input voltage signal or the voltage value of the analog input voltage value into a digital value with the predetermined number of bits is not feasible. In other words, if the accuracy of the analog-to-digital converter is insufficient to convert the analog input voltage signal to a digital value, then the switch of the at least one parallel circuit is rendered nonconductive by the controller. When the switch is nonconductive, the resistive element of the at least one parallel circuit is not bypassed by the switch.
    Furthermore, the control unit is preferably configured to control the switch of the at least one electrical parallel circuit on the basis of the analog input voltage signal in such a way that the switch is switched nonconducting if the voltage value of the analog input voltage signal is greater in magnitude than the magnitude-largest voltage value, which is convertible to a digital value having the predetermined number of bits; and the switch is turned on when the voltage value of the analog input voltage signal is less than or equal in magnitude to the magnitude largest voltage value that is convertible to a digital value having the predetermined number of bits.
    In other words, the control unit preferably controls the switch of the at least one parallel circuit on the basis of the analog input voltage signal such that the switch is turned on when the magnitude value of the analog input voltage signal lies within a first voltage range for whose voltage values the accuracy of the analog Digital converter is sufficient or its voltage values can be converted into a digital value with the predetermined number of bits. And the control unit preferably controls the switch of the at least one parallel circuit based on the analog input voltage signal such that the switch is nonconductive when the magnitude value of the analog input voltage signal is in a second voltage range for whose voltage values the accuracy of the analog to digital converter is not is sufficient or its voltage values in a digital value with the predetermined number of bits are not feasible.
    Furthermore, the control unit is preferably configured to control the switch of the at least one parallel circuit on the basis of the analog input voltage signal such that a voltage drops across the measuring element, which by the analog-to-digital converter in a digital value with the predetermined number Bits can be implemented. Based on the voltage range of the analog input voltage signal, i. (in an electrical parallel circuit in the matching circuit) if the magnitude value of the analog input voltage signal is in the first or second voltage range, then the analog to digital converter can output the corresponding digital value that reflects the analog input voltage signal.
    Preferably, the adaptive analog-to-digital converter circuit, in particular the control unit, comprises a look-up table in which the voltage values of the first and second voltage ranges are stored, such that the control unit compares the voltage value of the analog input voltage signal with the voltage values of the lookup pulses. Table can determine whether the magnitude of the voltage value of the input voltage signal is in the first voltage range or in the second voltage range.
    Preferably, the matching circuit comprises at least two electrical parallel circuits of a resistive element and a switch, wherein the at least two electrical parallel circuits are electrically connected in series.
    In other words, the matching circuit preferably comprises two or more electrical parallel circuits of a resistive element and a switch, wherein the two or more parallel circuits of a resistive element and a switch are electrically connected in series. That the matching circuit preferably comprises a series connection of at least two electrical parallel circuits.
    Further, the control unit is preferably configured to control the switches of the at least two parallel electrical circuits based on the analog input voltage signal such that the switch of each of the at least two parallel electrical circuits is nonconductive when the voltage value of the analog input voltage signal is greater than an absolute value is the first predetermined voltage value; the switch of one of the at least two parallel electrical circuits is nonconductive and the switch of the other of the at least two parallel electrical circuits is turned on when the voltage value of the analog input voltage signal is greater than a second predetermined voltage value and less than or equal to the first predetermined voltage value; and the switch of each of the at least two parallel electrical circuits is turned on when the voltage value of the analog input voltage signal is less than or equal to the second predetermined voltage value. In this case, the second predetermined voltage value corresponds to the magnitude-largest voltage value, which can be converted into a digital value having the predetermined number of bits; and the first predetermined voltage value is greater in magnitude than the second predetermined voltage value.
    In other words, preferably, the control unit controls the switches of the at least two parallel electrical circuits based on the analog input voltage signal such that the switches are turned on when the magnitude value of the analog input voltage signal is in a first voltage range, for the voltage values of the accuracy of Analog-to-digital converter is sufficient or its voltage values can be converted into a digital value with the predetermined number of bits. The control unit preferably controls the switches of the at least two parallel circuits on the basis of the analog input voltage signal such that the switch of an electrical parallel circuit of the at least two parallel circuits is turned on and the switch of the other electrical parallel circuit of the at least two electrical parallel circuits is nonconductive when the magnitude voltage value of the analog input voltage signal lies in a second voltage range for whose voltage values the accuracy of the analog-to-digital converter is insufficient or whose voltage values can not be converted into a digital value with the predetermined number of bits. And the control unit preferably controls the switches of the at least two parallel electrical circuits based on the analog input voltage signal such that the switches of the at least two electrical parallel circuits are nonconductive when the magnitude value of the analog input voltage signal is in a third voltage range for the voltage values of which second and first voltage range is insufficient. The absolute value of the smallest voltage value of the third voltage range is greater than the magnitude of the largest voltage value of the second voltage range and the magnitude smallest value of the second voltage range is greater than the magnitude of the largest voltage value of the first voltage range.
    Further, the control unit is preferably configured to control the switch of the at least two parallel circuits on the basis of the analog input voltage signal such that a voltage drops across the measuring element, which by the analog-to-digital converter in a digital value with the predetermined number Bits can be implemented. Based on the voltage range of the analog input voltage signal, i. (For two parallel electrical circuits in the matching circuit) whether the magnitude voltage value of the analog input voltage signal is in the first, second or third voltage range, then the analog-to-digital converter can output the corresponding digital value that reflects the analog input voltage signal.
    Further, the control unit is preferably configured to control the switches of the at least two parallel electrical circuits based on the analog input voltage signal such that the switch of each of the at least two parallel circuits is turned on when the voltage value of the analog input voltage signal is less than or equal to the magnitude amount is the largest voltage value that can be converted into a digital value with the predetermined number of bits; and the switches of the at least two parallel circuits are turned on successively with decreasing voltage value of the analog input voltage signal and / or successively switched non-conductive with increasing voltage value of the analog input voltage signal, if the voltage value of the analog input voltage signal is greater in magnitude than the magnitude largest voltage value, which in a digital value can be implemented with the predetermined number of bits.
    Preferably, the control unit is adapted to control the switches of the at least two parallel electrical circuits based on the analog input voltage signal such that the switches of the at least two parallel circuits with decreasing voltage value of the analog input voltage signal from the input of the adaptive analog-to-digital converter circuit be turned on in succession and / or be successively switched non-conductive with increasing voltage value of the analog input voltage signal from the measuring element, if the voltage value of the analog input voltage signal is greater in magnitude than the magnitude largest value that can be converted into a digital value with the predetermined number of bits; or the switches of the at least two parallel circuits with decreasing voltage value of the analog input voltage signal from the measuring element are turned on successively and / or switched successively non-conductive with increasing voltage value of the analog input voltage signal from the input of the adaptive analog-to-digital converter circuit, if the voltage value of amount of input voltage signal is greater than the magnitude largest voltage value that can be converted into a digital value with the predetermined number of bits.
    In other words, according to a first alternative, the switches of the at least two electrical parallel circuits are preferably controlled on the basis of the analog input voltage signal such that the switches of the at least two electrical parallel circuits are turned on successively with decreasing or decreasing voltage value of the analog input voltage signal in which first the switch of the parallel circuit is turned on, which is electrically connected or connected directly to the input of the adaptive analog-to-digital converter circuit. Additionally or alternatively, according to the first alternative, the switches of the at least two electrical parallel circuits are preferably controlled on the basis of the analog input voltage signal such that the switches of the at least two parallel electrical circuits are switched non-conductive in succession as the voltage value of the analog input voltage signal increases or increases first of the switches of the parallel circuit is switched non-conductive, which is electrically connected or connected directly to the measuring element of the adaptive analog-to-digital converter circuit.
    According to a second alternative, the switches of the at least two electrical parallel circuits are preferably controlled on the basis of the analog input voltage signal such that with decreasing or decreasing voltage value of the analog input voltage signal, the switches of the at least two parallel electrical circuits are turned on successively, wherein first of the switches of the parallel circuit is turned on, which is electrically connected or connected directly to the measuring element of the adaptive analog-to-digital converter circuit. Additionally or alternatively, according to the second alternative, the switches of the at least two electrical parallel circuits are preferably controlled on the basis of the analog input voltage signal such that the switches of the at least two parallel electrical circuits are switched non-conductive as the voltage value of the analog input voltage signal increases or increases in magnitude first, the switch of the parallel circuit is switched non-conducting, which is electrically connected or connected directly to the input of the adaptive analog-to-digital converter circuit.
    The electrical parallel connection of the matching circuit, in particular the series connection of at least two electrical parallel circuits, which is electrically connected directly to the input of the adaptive analog-to-digital converter circuit, can also be referred to as the uppermost or first electrical parallel circuit. The electrical parallel connection of the matching circuit, in particular the series connection of at least two electrical parallel circuits, which is electrically connected directly to the measuring element of the adaptive analog-to-digital converter circuit, can also be referred to as the lowest or last parallel electrical circuit.
    The parallel electrical circuit, which is electrically connected directly to the input of the adaptive analog-to-digital converter circuit, is in the matching circuit closest to the input of the adaptive analog-to-digital converter circuit and farthest to the adaptive analog-digital measuring element Converter circuit arranged. The electrical parallel circuit, which is electrically connected directly to the sensing element of the adaptive analog-to-digital converter circuit, is closest in the matching circuit to the sensing element of the adaptive analog-to-digital converter circuit and farthest to the input of the adaptive analog-to-digital converter. Converter circuit arranged.
    Further, preferably, the ohmic resistance of the resistive element of each electrical parallel circuit following the electrical parallel circuit directly electrically connected to the input of the adaptive A / D converter circuit is equal to twice the ohmic resistance of the resistive element of the parallel electrical circuit connected in the series electrical circuit from the at least two parallel circuits represents the respective preceding with respect to the input of the adaptive analog-to-digital Umset-zerschaltung electrical parallel circuit.
    In other words, preferably, the ohmic resistance of the resistive element of each parallel electrical circuit following in series with at least two parallel electric circuits of the uppermost and first parallel electrical circuits is twice the ohmic resistance of the resistive element of the respective ones in series at least two electrical parallel circuits preceding or previous electrical parallel circuit.
    [0056] in a plurality of parallel electric circuits in the matching circuit, preferably the ohmic resistance of the resistive element of the second electrical parallel circuit following the uppermost and first electrical parallel circuits is twice the ohmic resistance of the resistive element of the uppermost and first parallel electrical circuits; the ohmic resistance of the resistive element of the third electrical parallel circuit following the second electrical parallel circuit is twice as large as the ohmic resistance of the resistive element of the second electrical parallel circuit, etc.
    Preferably, the number of bits of the digital value, additional to the predetermined number of bits, into which the analog input voltage signal applied to the input of the adaptive analog-to-digital converter circuit is directly proportional to the number of parallel electrical circuits of the matching circuit.
    In other words, if, in the series connection of at least two electrical parallel circuits, each of the ohmic resistance of the resistance element of an electrical parallel circuit is twice as large as the ohmic resistance of the resistive element of the respective with respect to the input of the analog-to-digital Umsetzerschal-device previous electrical Parallel connection, then the number of additional bits, relative to the predetermined number of bits, of the digital value into which the analog input voltage signal applied to the input of the adaptive analog-to-digital converter circuit is convertible, corresponds to the number of parallel circuits of the matching circuit.
    For example, if the analog-to-digital converter can convert an analog voltage signal to an 8-bit digital value, i. the predetermined number of bits corresponds to 8 bits, and the matching circuit comprises 4 parallel electrical circuits, then the adaptive analog-to-digital converter circuit can convert the analog input voltage signal to a digital value of 12 bits (8 bits + 4 bits) since the additional number of bits (4 Bits) corresponds to the number of parallel electric circuits in the matching circuit.
    The above-mentioned optional features can be arbitrarily combined according to the present invention to give the inventive method.
    Further, according to the present invention, an operating device for operating a light path with at least one light source, preferably a light-emitting diode path with at least one light emitting diode, provided, wherein the operating device comprises at least one inventive adaptive analog-to-digital converter circuit described above, and wherein the at least an inventive adaptive analog-to-digital converter circuit is adapted to convert an analog voltage signal into a digital value.
    Furthermore, according to the present invention, a luminaire is provided with an above-described operating device according to the invention, comprising at least one above-described adaptive analog-to-digital converter circuit according to the invention, and a luminous means path with at least one luminous means, preferably a light-emitting diode path with at least one light-emitting diode wherein the operating device is adapted to supply the at least one light source of the light path with electrical energy.
    4. DESCRIPTION OF PREFERRED EMBODIMENTS
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description of FIG. 1 is given below, FIG. 1 schematically showing a preferred embodiment of an adaptive analog-to-digital converter circuit according to the invention.
    1 shows schematically a preferred embodiment of an inventive adaptive analog-to-digital converter circuit.
    The adaptive analog-to-digital converter circuit 1 comprises an input E1, a matching circuit 4, a measuring element ME, an analog-to-digital converter 2 and a control unit 3.
    According to FIG. 1, the matching circuit 4 comprises four electrical parallel circuits 5i, 52, 53, 54 each consisting of a resistance element R1, R2, R3, R4 and a switch S1, S2, S3 and S4, the four parallel electrical circuits 5 ^ 52, 53, 54 are electrically connected in series.
    However, the matching circuit 4 may also comprise only one electrical parallel circuit or a plurality of electrical parallel circuits. Thus, the matching circuit 4 comprises at least one electrical parallel circuit 5 made of a resistive element R and a switch S.
    The respective resistive elements R1, R2, R3, R4 preferably correspond, as already stated above, to a circuit having at least one ohmic resistance and / or at least one zener diode, which are connected in parallel and / or in series with electrical connections.
    Preferably, the respective resistive elements R1, R2, R3, R4 of the parallel electric circuits 5i, 52, 53, 54 comprise the same electrical components. The resistance elements R1, R2, R3, R4 of the electrical parallel circuits 5i, 52, 53, 54 may have the same ohmic resistance value or different ohmic resistance values.
    Preferably, each of the ohmic resistance of the resistive element of a parallel electrical circuit is twice as large as the ohmic resistance of the resistive element of the previous in the series of electrical parallel circuits with respect to the input E1 of the adaptive analog-to-digital converter circuit 1 parallel electrical circuit. That Preferably, the ohmic resistance of the resistive element R2 is twice the ohmic resistance of the resistive element R1, the ohmic resistance of the resistive element R3 is twice the ohmic resistance of the resistive element R2, and the ohmic resistance of the resistive element R4 is twice the resistive ohmic resistance Resistor element R3.
    The matching circuit is arranged in series between the input E1 of the adaptive analog-to-digital converter circuit 1 and the measuring element ME, wherein the first or top electrical parallel circuit 5i is electrically connected directly to the input E1 and the last or lowest parallel electrical circuit 54 is connected directly to the measuring element ME. An analog voltage signal, which is supplied to the input E1 of the adaptive analog-to-digital converter circuit 1, drops at the series circuit of matching circuit 4 and measuring element ME.
    The analog-to-digital converter 2 is arranged to convert an analog voltage signal into a digital value having a predetermined number of bits, e.g. 8 bits to implement. The input E2 of the analog-to-digital converter 2 is electrically connected to the node K between the matching circuit 4 and the measuring element ME. The analog voltage signal or the voltage which drops across the measuring element ME is therefore applied to the input E2 of the analog-to-digital converter 2. Consequently, the analog-to-digital converter 2 is configured to convert the analog voltage signal dropped at the measuring element ME into a digital value having a predetermined number of bits. The analog-to-digital converter 2 is preferably supplied with a supply voltage V.
    The analog-to-digital converter 2 then outputs the digital value at its output A2, which is connected to the output A1 of the adaptive analog-to-digital converter circuit 1.
    As already stated above, the measuring element ME preferably corresponds to a circuit having one or more ohmic resistors, which are electrically connected in parallel and / or in series. Particularly preferably, the measuring element corresponds to a cascade of ohmic resistors.
    The control unit 3 is adapted to the matching circuit 4, in particular the switches S1, S2, S3, S4 of the parallel circuits 5 ^ 52, 53, 54, and preferably the analog-to-digital converter 2 based on the input E1 supplied control analog input voltage signal as described above to convert the analog input voltage signal into a digital value.
    According to FIG. 1, the control unit 3 is preferably set up to include both the matching circuit 4, in particular the switches S1, S2, S3, S4 of the parallel circuits 5i, 52, 53, 54, as well as the analog-to-digital converter 2 according to FIGS to control the above statements. However, the control unit 3 can also be set up only to control the matching circuit 4.
    Further, the control unit 3 may be the control unit of the analog-to-digital converter 2.
    According to the preferred embodiment shown in Figure 1, the digital value output by the analog-to-digital converter 2 is preferably supplied from the output A2 of the analog-to-digital converter 2 to the control unit 3 (see arrow from the output A2 of the analog-digital Converter 2 to the control unit 3 in Figure 1), so that the control unit 3 can set the switches S1, S2, S3 and S4 of the matching circuit 4 according to the digital value or control.
    Further, the control unit 3 and the analog-to-digital converter 2 may preferably receive signals, e.g. Control signals, or information bidirectional exchange (see double arrow between the control unit 3 and analog-to-digital converter 2 in Figure 1).
    权利要求:
    Claims (10)
    [1]
    claims
    1. Adaptive analog-to-digital converter circuit (1), preferably for an operating device for operating a light path with at least one light source, preferably a light-emitting diode path with at least one light emitting diode, wherein the adaptive analog-to-digital converter circuit (1) comprises: a) an analog Digital converter (2) to whose input (E2) a measuring element (ME) is electrically connected, wherein the analog-to-digital converter (2) is adapted to a dropping at the measuring element (ME) analog voltage signal in a digital value to implement with a predetermined number of bits; b) a matching circuit (4) comprising at least one electrical parallel circuit (5i, 52, 53, 54) of a resistive element (R1, R2, R3, R4) and a switch (S1, S2, S3, S4); c) an input (E1) to which an analog input voltage signal can be supplied, the matching circuit (4) being electrically connected in series between the input (E1) of the adaptive analog-to-digital converter circuit (1) and the measuring element (ME), in that the analog input voltage signal supplied to the input (E1) of the analog-to-digital converter circuit drops at the electrical series circuit of matching circuit (4) and measuring element (ME), and wherein the node (K) between the matching circuit (4) and the measuring element (ME ) is electrically connected to the input (E2) of the analog-to-digital converter (2); and d) a control unit (3) which is set up to operate the switch (S1, S2, S3, S4) of the at least one electric parallel circuit (5i, 52, 53, 54) in dependence on the input (E1) of the adaptive analogue circuit. Digital converter circuit (1) to supply supplied analog input voltage signal.
    [2]
    2. Adaptive analog-to-digital converter circuit (1) according to claim 1, characterized in that the control unit (3) is adapted to the switch (S1, S2, S3, S4) of the at least one electrical parallel circuit (5 !, 52, 53, 54) depending on the input (E1) of the adaptive analog-to-digital converter circuit (1) to supply supplied analog input voltage signal such that the analog input voltage signal is convertible into a digital value having a greater number of bits than the predetermined number of bits ,
    [3]
    3. Adaptive analog-to-digital converter circuit (1) according to claim 1 or 2, characterized in that the resistance element (R1, R2, R3, R4) of the at least one electrical parallel circuit (5 ^ 52, 53, 54) of a circuit with at least corresponds to an ohmic resistance and / or at least one Zener diode.
    [4]
    4. Adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the adaptive analog-to-digital converter circuit (1) is designed, depending on the number of electrical parallel circuits (5 !, 52, 53, 54) of the matching circuit (4) and the predetermined number of bits to select the number of bits of the digital value in which the analog input voltage signal is to be converted.
    [5]
    5. Adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the ohmic resistance of the resistive element (R1, R2, R3, R4) of the electrical parallel circuit (5i) with the input (E1) of the adaptive analog-to-digital converter circuit (1) is directly electrically connected, the ohmic resistance of the measuring element (ME) corresponds.
    [6]
    6. Adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the control unit (3) is adapted to the switch (S1, S2, S3, S4) of the at least one electrical parallel circuit (5i, 52 , 53, 54) based on the analog input voltage signal such that the switch (S1, S2, S3, S4) is turned on when the analog input voltage signal is convertible to a digital value having the predetermined number of bits.
    [7]
    7. Adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the control unit (3) is adapted to the switch (S1, S2, S3, S4) of the at least one electrical parallel circuit (5 !, 52, 53, 54) based on the analog input voltage signal such that the switch (S1, S2, S3, S4) is rendered nonconductive when the analog input voltage signal is unreachable to a digital value having the predetermined number of bits.
    [8]
    8. Adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the control unit (3) is adapted to the switch (S1, S2, S3, S4) of the at least one electrical parallel circuit (5i, 52 , 53, 54) based on the analog input voltage signal such that - the switch is nonconductive when the voltage value of the analog input voltage signal is greater in magnitude than the magnitude largest voltage value convertible into a digital value having the predetermined number of bits, and - the switch is turned on when the voltage value of the analog input voltage signal is less than or equal in magnitude to the magnitude largest voltage value that can be converted into a digital value having the predetermined number of bits.
    [9]
    9. Operating device for operating a light path with at least one light source, preferably a light path with at least one light emitting diode, comprising at least one adaptive analog-to-digital converter circuit (1) according to one of the preceding claims, characterized in that the at least one adaptive analog-digital Converter circuit (1) is adapted to convert an analog voltage signal into a digital value.
    [10]
    10. Lamp with an operating device according to claim 9 and a light path with at least one light source, preferably a light-emitting diode path with at least one light emitting diode, characterized in that the operating device is adapted to provide the at least one light source of the light path with electrical energy. For this 1 sheet drawings
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    同族专利:
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    DE102017216715A1|2018-04-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5151700A|1989-08-04|1992-09-29|Matsushita Electric Industrial Co., Ltd.|Serial-parallel type a/d converter|
    FR2652689B1|1989-10-02|1994-12-23|France Etat|
    DE102012214717A1|2012-08-20|2014-02-20|Robert Bosch Gmbh|Method for controlling power or voltage of load e.g. electric heater of diesel engine to monitor exhaust gas composition, involves changing duty factor of pulse width modulation such that actual voltage corresponds to reference voltage|
    US9236878B2|2014-02-14|2016-01-12|Infineon Technologies Ag|Analog-to-digital conversion|DE202018104021U1|2018-07-12|2019-10-15|Tridonic Gmbh & Co Kg|Operating device with device for measuring an electric current|
    法律状态:
    2021-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20201031 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE202016105554.7U|DE202016105554U1|2016-10-06|2016-10-06|Adaptive analog-to-digital converter circuit|
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