• 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:
    A LOW-FREQUENCY POWER AMPLIFIER, containing a pulse-width modulator, the outputs of which are connected to the control inputs of p key stages with a transformer output, as well as a power source and a series-connected low-frequency filter and a load, characterized by the fact that output diodes, and n between the input of the low-frequency filter and the common bus are connected n series-connected diodes, and the anode of each diode is connected to one of the terminals of the transformer of the corresponding key cascade and the cathode - to the output of the diode cathode, the anode of which is connected to another transformer vgaodom corresponding key cascade priSP than power bus key stages are combined and connected to a power source.
    公开号:SU1153851A3
    申请号:SU2955216
    申请日:1980-08-07
    公开日:1985-04-30
    发明作者:Кириан Бохумил；Милавек Йоханн；Иол Вильхельм
    申请人:Пательхольд Патентфервальтунгс-Унд Электрохольдинг Аг (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to amplifying devices and can be used to drive loudspeakers, in systems for inductive heating, to control amplifiers and as amplifiers of modulating voltage for radio transmitters.
    A known power amplifier containing an envelope detector, connected in series by a detector and phase inverter, n pairs of key amplifiers, the output of the envelope detector through serially connected analog-to-digital converter and a decoder connected to the control inputs of all keys, and the load connected to the output through the filter 03 However, due to the fact that in this device the envelope of the input signal is converted into a stepped envelope, the famous amplifier has significant sweat p E, and hence a low efficiency.
    The closest in technical essence to the invention is a low-frequency power amplifier comprising a pulse-width modulator, the outputs of which are connected to control inputs of n key stages with a transformer output, as well as a power source and a series-connected low-pass filter and load.
    A well-known amplifier has a low and depends on the degree of modulation of efficiency.
    The purpose of the invention is to increase efficiency.
    The goal is achieved by the fact that a low-frequency power amplifier containing a pulse-width modulator, whose outputs are connected to the control inputs of key stages with a transformer output, as well as a power source and a series-connected low-frequency frequency and load, between the input of the low-frequency filter and the common bus is connected n series-connected diodes, while the anode of each diode is connected to one of the terminals of the transformer of the corresponding key stage, and the cathode to the cat ode of the output diode, the anode of which is connected to another end of the transformer of the corresponding key stage, the power supply bus of the key stages
    combined and connected to a power source.
    The drawing shows a structural electrical circuit of the device.
    The low-frequency power amplifier contains a pulse-width modulator 1, n key stages 2.2 ,. .., 2 with transformer input, power source 3, low-frequency filter 4, load 5, common bus 6, 7.7 diodes, ..., n o, 8, .., 8 output diodes.
    The device works as follows.
    The low-frequency input signal is converted by the pulse-width modulator 1 to at least two sequences of modulated over the duration of the pulses of the same frequency but shifted in phase by. Modulation improves the fill ratio. These pulse sequences are amplified separately from each other by n key stages 2, ..., Due to the fact that the load of each key stage is a transformer, pulses amplified in power and galvanically separated from the source 3 are generated on the secondary winding of the transformer. To increase the power gain in each key stage, several switching elements can be connected in parallel. The transformation ratio of the transformer windings is selected in accordance with the voltage to be obtained at the output. The generated pulses on the secondary windings are fed through output diodes 8, ..., 8 to a series of diodes 7, ..., the total sequence of output pulses, converted into a low-frequency filter 4 into an amplified low-frequency signal, is extracted as high voltage low frequency voltage on a load 5.
    Thus, the introduction of n key stages 2, ..., which are powered in parallel, and their outputs are galvanically separated by direct current / and connected via output diodes 8, ..., 8 in series to low-frequency filter 4, provides an independent from module : ..
    311538514
    shch and high efficiency amplifier. A variant of the sensor with amplitude modulation with a low-frequency low-frequency amplifier with a frequency gain is used to transmit radio signals of more than 1 MW.
    权利要求:
    Claims (1)
    [1]
    A LOW-FREQUENCY POWER AMPLIFIER containing a pulse-width modulator, the outputs of which are connected to the control inputs η of the key stages with a transformer output, as well as a power source and a low-pass filter in series and a load, characterized in that, in order to increase the efficiency, η is introduced output diodes, and η series-connected diodes are connected between the input of the low-pass filter and the common bus, and the anode of each diode is connected to one of the terminals of the transformer of the corresponding key stage a, and the cathode - to the cathode of the output diode, the anode of which is connected to the other terminal of the transformer coot-g of the corresponding key stage, and the power buses of the key stages are combined and connected to a power source.
    SU <"1153851 '1
    类似技术:
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2749015C1|2020-09-03|2021-06-03|Акционерное Общество "Концерн "Океанприбор"|Analog signal amplifier|US3253228A|1962-04-12|1966-05-24|Aerojet General Co|Modulator-demodulator amplifier|
    GB1248209A|1967-12-30|1971-09-29|Plessey Co Ltd|Improvements in or relating to modulation systems|
    US3579132A|1969-11-14|1971-05-18|Ltv Ling Altec Inc|Class {37 d{38 {0 linear audio amplifier|
    GB1596378A|1977-01-07|1981-08-26|Communications Patents Ltd|Amplifier systems|
    US4164714B1|1977-09-26|1984-12-25|DE3265563D1|1981-06-01|1985-09-26|Bbc Brown Boveri & Cie|Switching amplifier|
    US4580111A|1981-12-24|1986-04-01|Harris Corporation|Amplitude modulation using digitally selected carrier amplifiers|
    CH664461A5|1982-01-11|1988-02-29|Bbc Brown Boveri & Cie|SWITCHING AMPLIFIER.|
    CH662913A5|1982-06-25|1987-10-30|Bbc Brown Boveri & Cie|SWITCHING AMPLIFIER.|
    DE3502135A1|1985-01-19|1986-07-24|Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt|Circuit arrangement of a switching amplifier|
    DE3534678A1|1985-09-28|1987-04-09|Licentia Gmbh|SWITCHING AMPLIFIER|
    DE3541663A1|1985-11-26|1987-05-27|Licentia Gmbh|SWITCHING AMPLIFIER FOR ANALOGUE LF SIGNALS|
    CH671120A5|1986-11-20|1989-07-31|Bbc Brown Boveri & Cie|
    DE3907919A1|1988-07-07|1990-01-11|Olympia Aeg|POWER AMPLIFIER|
    DE3822990A1|1988-07-07|1990-01-11|Olympia Aeg|POWER AMPLIFIER|
    US5031143A|1990-11-21|1991-07-09|National Semiconductor Corporation|Preamplifier for ferroelectric memory device sense amplifier|
    DE19812069B4|1998-03-19|2005-07-07|Siemens Ag|A power amplifier and method for generating control signals for a power amplifier|
    WO2006137021A1|2005-06-23|2006-12-28|Koninklijke Philips Electronics N.V.|An inductive communication system with increased noise immunity using a low-complexity transmitter|
    JP2015054105A|2013-09-12|2015-03-23|ヘルスホールディングス株式会社|Ac electric potential therapy device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH730779|1979-08-09|
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