JPS561604A - Pulse duration modulating amplifier - Google Patents

Pulse duration modulating amplifier

Info

Publication number
JPS561604A
JPS561604A JP7743479A JP7743479A JPS561604A JP S561604 A JPS561604 A JP S561604A JP 7743479 A JP7743479 A JP 7743479A JP 7743479 A JP7743479 A JP 7743479A JP S561604 A JPS561604 A JP S561604A
Authority
JP
Japan
Prior art keywords
pulse duration
switch element
pulse
modulated wave
output signal
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
JP7743479A
Other languages
Japanese (ja)
Inventor
Shinya Sano
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7743479A priority Critical patent/JPS561604A/en
Publication of JPS561604A publication Critical patent/JPS561604A/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
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Abstract

PURPOSE:To decrease occurrence of the crossover distortion and then reduce the electrostatic high frequency noise, by driving the switch element of one side with the forwad pulse of the bipolar pulse duration modulated wave and also the switch element of the other side with the backward pulse respectively. CONSTITUTION:Comparator 3 performs a comparison between the input signal and the output signal of triangular wave generator 2; and comparator 4 gives a comparison between the output signal of phase inverter 1 and the output signal of generator 2 respectively. Then the addition or the subtraction is given to each unipolar pulse duration modulated wave obtained through the above comparison results by addition/subtraction means 24 and 25. Thus the bipolar pulse duration modulated wave is delivered. Switch element 5 is driven via transistor TR26 and with the forward pulse of the modulated wave; and switch element 6 is driven via TR27 and with the backward pulse respectively. In such way, the bipolar pulse duration modulated amplifying action is carried out in order to decrease occurrence of the crossover distortion as well as reduce the electrostatic high frequency noise.
JP7743479A 1979-06-18 1979-06-18 Pulse duration modulating amplifier Pending JPS561604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7743479A JPS561604A (en) 1979-06-18 1979-06-18 Pulse duration modulating amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7743479A JPS561604A (en) 1979-06-18 1979-06-18 Pulse duration modulating amplifier

Publications (1)

Publication Number Publication Date
JPS561604A true JPS561604A (en) 1981-01-09

Family

ID=13633897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7743479A Pending JPS561604A (en) 1979-06-18 1979-06-18 Pulse duration modulating amplifier

Country Status (1)

Country Link
JP (1) JPS561604A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202706A (en) * 1983-04-30 1984-11-16 Sanken Electric Co Ltd Method and device for converting direct current to optional voltage waveform
JPS61176812U (en) * 1985-04-19 1986-11-05
JPH06232648A (en) * 1993-01-29 1994-08-19 Rion Co Ltd Output circuit
JP2010263474A (en) * 2009-05-08 2010-11-18 Onkyo Corp Switching amplifier, and level shift circuit for the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202706A (en) * 1983-04-30 1984-11-16 Sanken Electric Co Ltd Method and device for converting direct current to optional voltage waveform
JPH0465564B2 (en) * 1983-04-30 1992-10-20 Sanken Electric Co Ltd
JPS61176812U (en) * 1985-04-19 1986-11-05
JPH06232648A (en) * 1993-01-29 1994-08-19 Rion Co Ltd Output circuit
US5387875A (en) * 1993-01-29 1995-02-07 Rion Kabushiki Kaisha Output circuit capable of driving a vibration device
JP2010263474A (en) * 2009-05-08 2010-11-18 Onkyo Corp Switching amplifier, and level shift circuit for the same

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