JPS5665509A - Pulse width modulating and amplifying circuit - Google Patents

Pulse width modulating and amplifying circuit

Info

Publication number
JPS5665509A
JPS5665509A JP14118179A JP14118179A JPS5665509A JP S5665509 A JPS5665509 A JP S5665509A JP 14118179 A JP14118179 A JP 14118179A JP 14118179 A JP14118179 A JP 14118179A JP S5665509 A JPS5665509 A JP S5665509A
Authority
JP
Japan
Prior art keywords
input terminal
carrier signal
pulse width
comparator
capacitor
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
JP14118179A
Other languages
Japanese (ja)
Inventor
Akio Tokuge
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP14118179A priority Critical patent/JPS5665509A/en
Publication of JPS5665509A publication Critical patent/JPS5665509A/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 remarkably improve high band distortion, by connecting a low pass filter to the output of a comparator to the noninverting input terminal of which a triangle wave carrier signal is fed, via an amplifier, and connecting a capacitor between the inverting input terminal and ground. CONSTITUTION:To an inverting input terminal of a comparator 10 having differential inputs, a tone signal Ei and a pulse width modulation signal Eo from a switching amplifier 4 are added at resistors R1, R2. Further, a feedback carrier signal is grounded at a capacitor C2, and a carrier signal is fed to the noninverting input terminal from a triangle wave oscillator 6. Accordingly, omega at the roll point has sufficiently higher frequency than that at the roll off point of a feedback voltage eN, and the degree of improvement of distortion at high band can be made greater than conventional systems.
JP14118179A 1979-11-02 1979-11-02 Pulse width modulating and amplifying circuit Pending JPS5665509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14118179A JPS5665509A (en) 1979-11-02 1979-11-02 Pulse width modulating and amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14118179A JPS5665509A (en) 1979-11-02 1979-11-02 Pulse width modulating and amplifying circuit

Publications (1)

Publication Number Publication Date
JPS5665509A true JPS5665509A (en) 1981-06-03

Family

ID=15286025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14118179A Pending JPS5665509A (en) 1979-11-02 1979-11-02 Pulse width modulating and amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5665509A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6178211A (en) * 1984-08-21 1986-04-21 ピ−ビ−　エレクトロニクス　コ−ポレ−シヨン Digital-audio-amplifier
JP2000151299A (en) * 1998-11-13 2000-05-30 Stmicroelectronics Srl Pwm bridge amplifier equipped with input network whose type can be specified for analog of digital input requiring no triangular wave generator
WO2000059109A1 (en) * 1999-03-30 2000-10-05 Digital Power Systems Ag Class d digital amplifier
JP2009123494A (en) * 2007-11-14 2009-06-04 Panasonic Electric Works Co Ltd Illuminating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52113666A (en) * 1976-03-19 1977-09-22 Sansui Electric Co Negative feedback circuit
JPS5520036A (en) * 1978-07-31 1980-02-13 Sansui Electric Co Pulse duration modulated negative feedback amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52113666A (en) * 1976-03-19 1977-09-22 Sansui Electric Co Negative feedback circuit
JPS5520036A (en) * 1978-07-31 1980-02-13 Sansui Electric Co Pulse duration modulated negative feedback amplifier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6178211A (en) * 1984-08-21 1986-04-21 ピ−ビ−　エレクトロニクス　コ−ポレ−シヨン Digital-audio-amplifier
JP2000151299A (en) * 1998-11-13 2000-05-30 Stmicroelectronics Srl Pwm bridge amplifier equipped with input network whose type can be specified for analog of digital input requiring no triangular wave generator
WO2000059109A1 (en) * 1999-03-30 2000-10-05 Digital Power Systems Ag Class d digital amplifier
JP2009123494A (en) * 2007-11-14 2009-06-04 Panasonic Electric Works Co Ltd Illuminating device

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