• 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 circuit includes a generator that is directly proportional to absolute temperature. No calibration or external reference components are needed.
    公开号:KR20000070027A
    申请号:KR1019997006246
    申请日:1998-09-21
    公开日:2000-11-25
    发明作者:앙그미셀
    申请人:요트.게.아. 롤페즈；코닌클리케 필립스 일렉트로닉스 엔.브이.；
    IPC主号:
    专利说明:

    Integrated circuit and voltage generation method comprising a device for generating a voltage proportional to the absolute temperature {Generator for generating voltage proportional to absolute temperature}
    The power consumed while using the electronic circuitry itself appears as heat. Typically, the heat generated by integrated circuits increases with increasing transistor density and increasing clock frequency. Temperature dependent voltage generators are known as described in Paul R. Gray and Robert G. Meyers, Second Edition of "Analysis and Design of Analog Intergrated Circuits," © 1984 293-296.
    The present invention relates to an electronic circuit integrated on a semiconductor substrate to provide a voltage signal proportional to absolute temperature.
    1 is a diagram of a voltage generating circuit according to the present invention.
    A voltage generator circuit is provided for generating a voltage proportional to the absolute temperature of the substrate. The circuit does not require calibration or external reference components.
    The present invention will be described in more detail with reference to FIG. 1.
    1, in the present invention, a diagram of a voltage generating circuit 300 for an integrated circuit on a substrate is shown. The voltage generation circuit 300 provides an output voltage proportional to the absolute temperature of the substrate and is independently performed.
    The two current branches 302 and 304 of the voltage generator circuit 300 are in parallel between the node 306 and ground (GND). Branch 302 includes a series arrangement of resistors 308 and diodes 310. Branch 304 includes a series arrangement of resistors 312 and 314 and a parallel arrangement of a plurality of N diodes. In the present invention, N = 20. Node 306 is the output of the current mirror with FETs 318 and 320. Node 322 is the input of current mirrors 318 and 320. Node 322 is connected to current source 324. The first input of amplifier 326 is connected to node 328 between resistors 312 and 314. The second input of the amplifier 326 is connected to the node 330 between the resistor 308 and the diode 310. The output of the amplifier 326 is connected to the control input of the current source 324. In this example, the resistors 308 and 312 have the same value. The configuration of the voltage generator circuit 300 forms a negative feedback loop to control the current through the branches 302 and 304 as follows.
    The current I 302 of the branch 302 is expressed as follows.
    I 302 = I 0 exp (qV be310 / kT) = I 0 exp (qV 330 / kT) (1)
    here,
    I 0 is a constant that depends on geometry and dopant profiles,
    V be310 is the junction voltage of the diode 310,
    q is the base charge,
    k is Boltzmann's constant,
    T is the Kelvin absolute temperature of the substrate,
    V 330 is the voltage at node 330.
    The current I 304 in the branch 304 appears as follows.
    NI 304 = NI 0 exp (qV be316 / kT) (2)
    here,
    V be316 is the voltage drop across one diode in the parallel arrangement 316 of N diodes,
    I 304 is the current through one diode in array 316.
    The negative feedback loop controls the currents so that the voltage at node 330 is equal to the voltage at node 328 as follows.
    V 330 = V be316 + NI 304 R (3)
    Where R is the resistance of resistor 314.
    Equation (3) is converted to
    (kT / q) log (I 302 / I 0 ) = (kT / q) log (I 304 / I 0 ) + NI 304 R (4)
    This equation is equivalent to
    (kT / q) log (I 302 / I 304 ) = NI 304 R (5)
    The condition that the voltage at node 330 becomes equal to the voltage at node 328 is also converted as follows:
    I 302 R 308 = NI 304 R 310 (6)
    here,
    R 308 is the resistance of resistor 308,
    R 310 is the resistance of resistor 310.
    In this example, R 308 = R 310 ,
    I 302 = NI 304 (7)
    Combining equations (7) and (5), we get
    (kT / q) logN = NI 304 R = I 302 R (8)
    Or
    I 302 = NI 304 = {(kT / q) logN} / R (9)
    Equation (9) means that the total current at the output 306 of the mirrors 318/320 is proportional to the absolute temperature T and inversely proportional to the resistance R. Mirroring out the current to the current source via an additional mirror output 332 provides a current I out that is proportional to the absolute temperature T and inversely proportional to the resistance R. This current I out becomes a flow through another resistor 334 with a resistor R 'made in the same IC process as in the resistor 314. Since the temperature dependence of the resistors 314 and 334 is canceled, the node 336 between the mirror output 332 and the resistor 334 has a voltage proportional to the absolute temperature. Comparing this voltage with a well controllable reference voltage V ref produces a control voltage in differential amplifier 338.
    Since the thermostat circuit 300 provides a signal voltage proportional to absolute temperature, no calibration, such as laser-trimming or external components, is required. As can be readily understood, the present invention generates a signal proportional to absolute temperature, thereby eliminating the need for calibration. The invention may be included in any subsystem of a larger overall system or may be included in a separate system. Those skilled in the art can easily modify various aspects of the present invention.
    Thus, all the things included in the above description or shown in the accompanying drawings are diagrammatically as the objects mentioned at the outset can be effectively achieved and the above-mentioned arrangements can be modified without departing from the spirit and scope of the invention. It can be seen that it should be interpreted and not intended to be limiting.
    It is also to be understood that the following claims are intended to cover all of the features and general features and specific features of the invention described herein.
    The invention is applicable to electronic circuits integrated in a semiconductor substrate that provide a voltage signal proportional to absolute temperature.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] An integrated circuit comprising a device for generating a voltage proportional to an absolute temperature,
    Current mirrors 318 and 320 having a mirror input 322, a first mirror output 306 and a second mirror output,
    First and second current branches 303 and 304 connected in parallel to the first mirror output 306,
    A first amplifier input 330 connected between the first resistor 308 and the first diode 310, a second amplifier input 328 connected between the second and third resistors 312, 314, and An operational amplifier 326 having an amplifier output,
    A controllable current source 324 having a control input connected to the amplifier output and connected to the mirror input 322,
    The first current branch 302 includes a first series arrangement of a first resistor 308 and a first diode 310,
    The second current branch (304) comprises a second series arrangement of a second resistor (312) and a third resistor (314) and a parallel arrangement of a plurality of additional diodes (316).
    [2" claim-type="Currently amended] In a method for generating a voltage proportional to an absolute temperature,
    Providing a current to the mirror input 322 of the current mirrors 318 and 320 having a first mirror output 306 and a second mirror output,
    Providing a first mirror output current from the first mirror output 306 to first and second current branches 302, 304 connected in parallel to the first mirror output;
    The first current branch 302 includes a first series arrangement of a first resistor and a first diode 310,
    The second current branch 304 includes a second series arrangement of second and third resistors 312 and 314 and a parallel arrangement of a plurality of additional diodes 316,
    Provide a first branch current 330 to a first amplifier input of an operational amplifier 326 connected between the first resistor 308 and the first diode 310, and the second and third resistors 312 Providing a second branch current to the second branch amplifier input 328 of the operational amplifier 326 connected between 314 and outputting an amplifier output from the output of the operational amplifier 326;
    Providing the amplifier output to a control input of a controllable current source 324 connected to the mirror input 322;
    Providing a second mirror output from the second mirror output to a third branch comprising a fourth resistor 334;
    Providing a voltage proportional to an absolute temperature at a node (336) between the second mirror output and the fourth resistor (334).
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    同族专利:
    公开号 | 公开日
    WO1999024801A1|1999-05-20|
    JP2001508216A|2001-06-19|
    EP0951637A1|1999-10-27|
    US6037833A|2000-03-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-11-10|Priority to US8/966,725
    1997-11-10|Priority to US08/966,725
    1998-09-21|Application filed by 요트.게.아. 롤페즈, 코닌클리케 필립스 일렉트로닉스 엔.브이.
    2000-11-25|Publication of KR20000070027A
    优先权:
    申请号 | 申请日 | 专利标题
    US8/966,725|1997-11-10|
    US08/966,725|US6037833A|1997-11-10|1997-11-10|Generator for generating voltage proportional to absolute temperature|
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