JPS56141611A - Amplifier by pulse width modulation system - Google Patents

Amplifier by pulse width modulation system

Info

Publication number
JPS56141611A
JPS56141611A JP4463280A JP4463280A JPS56141611A JP S56141611 A JPS56141611 A JP S56141611A JP 4463280 A JP4463280 A JP 4463280A JP 4463280 A JP4463280 A JP 4463280A JP S56141611 A JPS56141611 A JP S56141611A
Authority
JP
Japan
Prior art keywords
signal
pwm
high frequency
amplifier
pulse width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4463280A
Other languages
Japanese (ja)
Inventor
Harushige Nakagaki
Shinichi Ohashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4463280A priority Critical patent/JPS56141611A/en
Publication of JPS56141611A publication Critical patent/JPS56141611A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To execute amplification efficiently by push-pull-driving two sets of DC- DC transducers which are constituted of high frequency transformers, by a signal which has been PWM-modulated. CONSTITUTION:An input signal ei is input to the PWM transducer 12 through the preamplifier 7, becomes a signal es which has been PWM-modulated, and drives the switches 18, 19. The switches 18, 19 control complementarily that the DC power source is applied to the high frequency transformers 20, 21, and when they are driven by the PWM wave, a complementary signal appears in the secondary side of the high frequency transformer. When this signal is rectified and smoothed, it is possible to output an amplified signal to the speaker 11 of load.
JP4463280A 1980-04-07 1980-04-07 Amplifier by pulse width modulation system Pending JPS56141611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4463280A JPS56141611A (en) 1980-04-07 1980-04-07 Amplifier by pulse width modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4463280A JPS56141611A (en) 1980-04-07 1980-04-07 Amplifier by pulse width modulation system

Publications (1)

Publication Number Publication Date
JPS56141611A true JPS56141611A (en) 1981-11-05

Family

ID=12696792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4463280A Pending JPS56141611A (en) 1980-04-07 1980-04-07 Amplifier by pulse width modulation system

Country Status (1)

Country Link
JP (1) JPS56141611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010272336A (en) * 2009-05-21 2010-12-02 Kyoto Denkiki Kk Power supply device for electron beam scanning

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54157066A (en) * 1978-05-31 1979-12-11 Sony Corp Pulse width modulation output amplifying circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54157066A (en) * 1978-05-31 1979-12-11 Sony Corp Pulse width modulation output amplifying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010272336A (en) * 2009-05-21 2010-12-02 Kyoto Denkiki Kk Power supply device for electron beam scanning

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