JPS54157066A - Pulse width modulation output amplifying circuit - Google Patents

Pulse width modulation output amplifying circuit

Info

Publication number
JPS54157066A
JPS54157066A JP6537378A JP6537378A JPS54157066A JP S54157066 A JPS54157066 A JP S54157066A JP 6537378 A JP6537378 A JP 6537378A JP 6537378 A JP6537378 A JP 6537378A JP S54157066 A JPS54157066 A JP S54157066A
Authority
JP
Japan
Prior art keywords
input terminal
supplied
balanced
integrating circuit
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.)
Granted
Application number
JP6537378A
Other languages
Japanese (ja)
Other versions
JPS6017168B2 (en
Inventor
Tadao Yoshida
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP53065373A priority Critical patent/JPS6017168B2/en
Publication of JPS54157066A publication Critical patent/JPS54157066A/en
Publication of JPS6017168B2 publication Critical patent/JPS6017168B2/en
Expired 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 prevent the power loss at a non-signal time by supplying the input of sound signals to the inversion input terminal to one balanced integrating circuit and grounding the non-inversion input terminal. CONSTITUTION:Sound signals supplied to input terminal 1 are not only connected to non-inversion input terminal + of balanced integrating circuit 2a but also connected to inversion input terminal - of balanced integrating circuit 2b, and further, the + terminal of circuit 2b is grounded. Then, the output of square wave signal generator 7 is supplied to - terminals of circuits 2a and 2b, and these outputs are supplied to amplifiers 5a and 5b through zero-cross switch circuits 4a and 4b respectively and are supplied to speaker 10 through LPF 9. By this constitution, though in-phase square wave signals are obtained in the output side of circuits 5a and 5b at a non-signal time, they are cancelled in the input side of filter 9, and no invalid current is flowed. As a result, power loss can be prevented.
JP53065373A 1978-05-31 1978-05-31 Pulse width modulation output amplifier circuit Expired JPS6017168B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53065373A JPS6017168B2 (en) 1978-05-31 1978-05-31 Pulse width modulation output amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53065373A JPS6017168B2 (en) 1978-05-31 1978-05-31 Pulse width modulation output amplifier circuit

Publications (2)

Publication Number Publication Date
JPS54157066A true JPS54157066A (en) 1979-12-11
JPS6017168B2 JPS6017168B2 (en) 1985-05-01

Family

ID=13285088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53065373A Expired JPS6017168B2 (en) 1978-05-31 1978-05-31 Pulse width modulation output amplifier circuit

Country Status (1)

Country Link
JP (1) JPS6017168B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56141611A (en) * 1980-04-07 1981-11-05 Hitachi Ltd Amplifier by pulse width modulation system
US4968948A (en) * 1988-12-28 1990-11-06 Pioneer Electronic Corporation Pulse width modulation amplifier circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7069907B2 (en) 2018-03-20 2022-05-18 富士フイルムビジネスイノベーション株式会社 Information processing equipment, printing systems and programs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56141611A (en) * 1980-04-07 1981-11-05 Hitachi Ltd Amplifier by pulse width modulation system
US4968948A (en) * 1988-12-28 1990-11-06 Pioneer Electronic Corporation Pulse width modulation amplifier circuit

Also Published As

Publication number Publication date
JPS6017168B2 (en) 1985-05-01

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