[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS5639606A - Self-excited type d-class amplifier - Google Patents

Self-excited type d-class amplifier

Info

Publication number
JPS5639606A
JPS5639606A JP11551179A JP11551179A JPS5639606A JP S5639606 A JPS5639606 A JP S5639606A JP 11551179 A JP11551179 A JP 11551179A JP 11551179 A JP11551179 A JP 11551179A JP S5639606 A JPS5639606 A JP S5639606A
Authority
JP
Japan
Prior art keywords
capacitor
frequency
way
oscillation
self
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
JP11551179A
Other languages
Japanese (ja)
Other versions
JPS6121007B2 (en
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 JP11551179A priority Critical patent/JPS5639606A/en
Publication of JPS5639606A publication Critical patent/JPS5639606A/en
Publication of JPS6121007B2 publication Critical patent/JPS6121007B2/ja
Granted 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters

Landscapes

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

Abstract

PURPOSE:To suppress an influence of fluctuations of an electric power source voltage as to a self-excited D-class amplifier, by making oscillation conditions unchangeable even when load states change by separating a feedback system path, determining an oscillation frequency, from the determining the whole frequency characteristics. CONSTITUTION:By way of the integrating circuit consisting of operational amplifier 9 and capacitor 10, an input signal from input terminal 1 is sent to comparator 2, the output of which is supplied to LPF consisting of coil 4 and capacitor 5 through switching circuit 3. Then, its output is fed back to the other-side input of comparato 2 by way of the 1st feedback circuits 6 and 7 composed of resistor 6 and capacitor 7 and also to integrators 9 and 10 by way of the 2nd feedback circuit composed of resistors 11 and 12. Consequently, frequency response characteristics are flat in the low-frequency range and rise suddenly nearly at the oscillation frequency to make oscillation conditions unchangeable according to the load state, so that an influence of fluctuations of the electric power source voltage can be suppressed.
JP11551179A 1979-09-07 1979-09-07 Self-excited type d-class amplifier Granted JPS5639606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11551179A JPS5639606A (en) 1979-09-07 1979-09-07 Self-excited type d-class amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11551179A JPS5639606A (en) 1979-09-07 1979-09-07 Self-excited type d-class amplifier

Publications (2)

Publication Number Publication Date
JPS5639606A true JPS5639606A (en) 1981-04-15
JPS6121007B2 JPS6121007B2 (en) 1986-05-24

Family

ID=14664325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11551179A Granted JPS5639606A (en) 1979-09-07 1979-09-07 Self-excited type d-class amplifier

Country Status (1)

Country Link
JP (1) JPS5639606A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58114607A (en) * 1981-12-28 1983-07-08 Nippon Columbia Co Ltd Power amplifier
JPS6098708A (en) * 1983-11-04 1985-06-01 Yaesu Musen Co Ltd Low frequency amplifier circuit
JPH0392816U (en) * 1990-11-07 1991-09-20
EP1376858A1 (en) * 1996-10-31 2004-01-02 Bang & Olufsen A/S Pulse modulation power amplifier with enhanced cascade control method
JP2005303814A (en) * 2004-04-14 2005-10-27 Nec Electronics Corp Class-d amplifier
WO2006109245A1 (en) * 2005-04-15 2006-10-19 Koninklijke Philips Electronics N.V. Class-d amplifier
WO2007099442A1 (en) * 2006-03-03 2007-09-07 Bang & Olufsen Icepower A/S Hybrid feedback controlled oscillation modulator and switching power amplifier system
WO2008006367A1 (en) * 2006-07-11 2008-01-17 The Tc Group A/S A high-mode self-oscillating pulse modulator
WO2008037261A1 (en) * 2006-09-28 2008-04-03 Pascal A/S Controlled power converter
US7391258B2 (en) 2003-06-27 2008-06-24 Tc Electronic A/S Self-oscillating power circuit
NL1036600C2 (en) * 2009-02-18 2010-08-19 Hypex Electronics B V Self oscillating class d amplification device.
EP2221964A1 (en) 2009-02-18 2010-08-25 Hypex Electronics B.V. Self oscillating class D amplification device
JP2012054626A (en) * 2010-08-31 2012-03-15 Fujitsu Semiconductor Ltd Output switching circuit
WO2012036066A1 (en) * 2010-09-13 2012-03-22 株式会社ウインズ Self-oscillating circuit and class d amplifier
JP2012225930A (en) * 2011-04-21 2012-11-15 Abb Ag Current sensor for performing control based on compensation principle
CN107231136A (en) * 2016-03-25 2017-10-03 雅马哈株式会社 The self oscillating class D amplifier of BTL outputs
JP2018088575A (en) * 2016-11-28 2018-06-07 協同電子エンジニアリング株式会社 Class D power amplifier

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6452168U (en) * 1987-09-28 1989-03-30
JP5633163B2 (en) * 2010-03-18 2014-12-03 ヤマハ株式会社 Class D power amplifier
JP6699073B2 (en) 2016-03-25 2020-05-27 ヤマハ株式会社 Self-excited class D amplifier
JP6724996B2 (en) 2016-09-29 2020-07-15 ヤマハ株式会社 Class D amplifier

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58114607A (en) * 1981-12-28 1983-07-08 Nippon Columbia Co Ltd Power amplifier
JPS6098708A (en) * 1983-11-04 1985-06-01 Yaesu Musen Co Ltd Low frequency amplifier circuit
JPH0392816U (en) * 1990-11-07 1991-09-20
JPH0520009Y2 (en) * 1990-11-07 1993-05-26
EP1376858A1 (en) * 1996-10-31 2004-01-02 Bang & Olufsen A/S Pulse modulation power amplifier with enhanced cascade control method
US7391258B2 (en) 2003-06-27 2008-06-24 Tc Electronic A/S Self-oscillating power circuit
EP1639702B1 (en) * 2003-06-27 2008-11-19 The TC Group A/S Self-oscillating power circuit
JP2005303814A (en) * 2004-04-14 2005-10-27 Nec Electronics Corp Class-d amplifier
JP4731828B2 (en) * 2004-04-14 2011-07-27 ルネサスエレクトロニクス株式会社 Class D amplifier
WO2006109245A1 (en) * 2005-04-15 2006-10-19 Koninklijke Philips Electronics N.V. Class-d amplifier
WO2007099442A1 (en) * 2006-03-03 2007-09-07 Bang & Olufsen Icepower A/S Hybrid feedback controlled oscillation modulator and switching power amplifier system
US8013678B2 (en) 2006-03-03 2011-09-06 Bang & Olufsen Icepower A/S, Gi. Hybrid feedback controlled oscillation modulator and switching power amplifier system
WO2008006367A1 (en) * 2006-07-11 2008-01-17 The Tc Group A/S A high-mode self-oscillating pulse modulator
WO2008037261A1 (en) * 2006-09-28 2008-04-03 Pascal A/S Controlled power converter
US7893743B2 (en) 2006-09-28 2011-02-22 Pascal A/S Controlled power converter
NL1036600C2 (en) * 2009-02-18 2010-08-19 Hypex Electronics B V Self oscillating class d amplification device.
JP2010193455A (en) * 2009-02-18 2010-09-02 Hypex Electronics Bv Self-oscillating class d amplification device
EP2221964A1 (en) 2009-02-18 2010-08-25 Hypex Electronics B.V. Self oscillating class D amplification device
US8049557B2 (en) 2009-02-18 2011-11-01 Hypex Electronics B.V. Self oscillating class D amplification device
JP2012054626A (en) * 2010-08-31 2012-03-15 Fujitsu Semiconductor Ltd Output switching circuit
US8957648B2 (en) 2010-08-31 2015-02-17 Spansion Llc Output switching circuit
US9502979B2 (en) 2010-08-31 2016-11-22 Cypress Semiconductor Corporation Output switching circuit
WO2012036066A1 (en) * 2010-09-13 2012-03-22 株式会社ウインズ Self-oscillating circuit and class d amplifier
JP2012225930A (en) * 2011-04-21 2012-11-15 Abb Ag Current sensor for performing control based on compensation principle
CN107231136A (en) * 2016-03-25 2017-10-03 雅马哈株式会社 The self oscillating class D amplifier of BTL outputs
JP2018088575A (en) * 2016-11-28 2018-06-07 協同電子エンジニアリング株式会社 Class D power amplifier

Also Published As

Publication number Publication date
JPS6121007B2 (en) 1986-05-24

Similar Documents

Publication Publication Date Title
JPS5639606A (en) Self-excited type d-class amplifier
EP0079098A1 (en) Amplifier with signal-dependent voltage supply source
US5304941A (en) Sensor detection signal extracting circuit with offset voltage cancelling ability
JPS5683135A (en) Pll circuit
JPS5752239A (en) Noise reducing circuit
MY100773A (en) Frequency to current converter circuit.
JPS56166613A (en) Voltage to current converting circuit
JPS57121308A (en) Power amplifier
JPS5620315A (en) Low-frequency amplifying circuit
JPS5717207A (en) Amplifying circuit
JPS5696518A (en) Tone control circuit
JPS54118149A (en) Comparator circuit
JPS56109012A (en) Automatic gain control circuit
JPS6471317A (en) Threshold comparing circuit
JPS57199396A (en) Speaker input controlling circuit
JPS5687907A (en) Adjuster of sound quality
JPS5586215A (en) Doubling circuit
JPS6464576A (en) Mechanical resonance cancelling system
KR900001438Y1 (en) Graphic equalizer device
JPS5750115A (en) Gain control circuit
JPS5696307A (en) Constant-current circuit
JPS56155407A (en) Electronic controller
JPS55150658A (en) Current supply circuit
JPS5657960A (en) Frequency-current converting circuit
JPS5671314A (en) Differential amplifying circuit