SE467331B - Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg - Google Patents

Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg

Info

Publication number
SE467331B
SE467331B SE9003426A SE9003426A SE467331B SE 467331 B SE467331 B SE 467331B SE 9003426 A SE9003426 A SE 9003426A SE 9003426 A SE9003426 A SE 9003426A SE 467331 B SE467331 B SE 467331B
Authority
SE
Sweden
Prior art keywords
amplifier
pulse
voltage
power supply
signal
Prior art date
Application number
SE9003426A
Other languages
English (en)
Swedish (sv)
Other versions
SE9003426L (sv
SE9003426D0 (sv
Inventor
K Andersson
Original Assignee
Andersson & Baevholm Lab
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 Andersson & Baevholm Lab filed Critical Andersson & Baevholm Lab
Priority to SE9003426A priority Critical patent/SE467331B/sv
Publication of SE9003426D0 publication Critical patent/SE9003426D0/xx
Priority to EP91850266A priority patent/EP0483094B1/de
Priority to DE69127340T priority patent/DE69127340T2/de
Priority to US07/784,658 priority patent/US5200711A/en
Publication of SE9003426L publication Critical patent/SE9003426L/xx
Publication of SE467331B publication Critical patent/SE467331B/sv

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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0233—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply
    • H03F1/0238—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/351—Pulse width modulation being used in an amplifying circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
SE9003426A 1990-10-26 1990-10-26 Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg SE467331B (sv)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9003426A SE467331B (sv) 1990-10-26 1990-10-26 Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg
EP91850266A EP0483094B1 (de) 1990-10-26 1991-10-25 Pulsbreitenmodulierter linearer Leistungsverstärker
DE69127340T DE69127340T2 (de) 1990-10-26 1991-10-25 Pulsbreitenmodulierter linearer Leistungsverstärker
US07/784,658 US5200711A (en) 1990-10-26 1991-10-28 Pulse-width modulated, linear audio-power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9003426A SE467331B (sv) 1990-10-26 1990-10-26 Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg

Publications (3)

Publication Number Publication Date
SE9003426D0 SE9003426D0 (sv) 1990-10-26
SE9003426L SE9003426L (sv) 1992-04-27
SE467331B true SE467331B (sv) 1992-06-29

Family

ID=20380752

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9003426A SE467331B (sv) 1990-10-26 1990-10-26 Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg

Country Status (4)

Country Link
US (1) US5200711A (de)
EP (1) EP0483094B1 (de)
DE (1) DE69127340T2 (de)
SE (1) SE467331B (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450036A (en) * 1993-02-23 1995-09-12 Rohm Co., Ltd. Power amplifier circuit for audio signal and audio device using the same
US5424684A (en) * 1993-03-04 1995-06-13 Rohm Co., Ltd. Power amplifier circuit for audio signal and audio device using the same
US5410592A (en) * 1993-06-04 1995-04-25 Harris Corporation Class `D` audio speaker amplifier circuit with state variable feedback control
US5396194A (en) * 1993-11-19 1995-03-07 Carver Corporation Audio frequency power amplifiers
US5508658A (en) * 1994-04-27 1996-04-16 Rohm Co., Ltd. Power amplifier circuit for audio signal and audio device using the same
US5543753A (en) * 1994-06-22 1996-08-06 Carver Corporation Audio frequency power amplifiers with actively damped filter
US5606289A (en) * 1994-06-22 1997-02-25 Carver Corporation Audio frequency power amplifiers with actively damped filter
DE19740137A1 (de) * 1997-09-12 1999-03-18 Alsthom Cge Alcatel Verfahren und Schaltungsanordnung zur Rufwechselspannungserzeugung für elektronische Teilnehmerschaltungen
US5990751A (en) * 1997-10-16 1999-11-23 Nikon Corporation Method and apparatus for improving power transfer efficiency of an amplifier system
WO2000007291A2 (en) * 1998-07-24 2000-02-10 Toccata Technology Aps A method of attenuating zero crossing distortion and noise in an amplifier, an amplifier and uses of the method and the amplifier
US6172490B1 (en) * 1999-12-08 2001-01-09 Alcatel Networks Corporation Precise rail tracking method for powering dual voltage integrated circuits
WO2002005418A2 (en) * 2000-07-12 2002-01-17 Indigo Manufacturing Inc. Power amplifier with multiple power supplies
US6621335B2 (en) * 2001-04-18 2003-09-16 Microsemi Corporation Class D amplifier with passive RC network
US20030095666A1 (en) * 2001-11-16 2003-05-22 Ramage Robert D. Machine for controlling and amplifying a low-level audio signal using a high efficiency class D switching amplifier
US20030095000A1 (en) * 2001-11-16 2003-05-22 Acoustic Technology, Inc. Apparatus with ultra high output power class D audio amplifier
JP3894294B2 (ja) * 2001-11-19 2007-03-14 ソニー株式会社 パワーアンプ
US8036402B2 (en) * 2005-12-15 2011-10-11 Harman International Industries, Incorporated Distortion compensation
RU2307454C1 (ru) * 2006-04-10 2007-09-27 Сергей Всеволодович Шпак Усилитель с высоким кпд
GB2446843B (en) * 2006-06-30 2011-09-07 Wolfson Microelectronics Plc Amplifier circuit and methods of operation thereof
US7719141B2 (en) * 2006-11-16 2010-05-18 Star Rf, Inc. Electronic switch network
US8362838B2 (en) * 2007-01-19 2013-01-29 Cirrus Logic, Inc. Multi-stage amplifier with multiple sets of fixed and variable voltage rails
US7863841B2 (en) * 2007-06-15 2011-01-04 Paolo Menegoli Class H drive
US7786804B2 (en) * 2008-06-02 2010-08-31 Mediatek Singapore Pte. Ltd. Driving amplifier circuit with digital control and DC offset equalization
DE102008030576B3 (de) 2008-06-27 2009-12-03 Texas Instruments Deutschland Gmbh Hocheffizienter Präzisionsverstärker
US8754705B2 (en) 2011-08-01 2014-06-17 Crestron Electronics Inc. Audio amplifier power supply with inherent power factor correction
JP5883706B2 (ja) * 2012-03-30 2016-03-15 株式会社ショーワ 相対角度検出装置および電動パワーステアリング装置
US9013239B2 (en) 2012-05-15 2015-04-21 Crestron Electronics Inc. Audio amplifier power supply with inherent power factor correction
EP3729642B1 (de) * 2017-12-20 2025-01-29 Dolby Laboratories Licensing Corporation Konfigurierbares modales verstärkersystem

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51121239A (en) * 1975-04-17 1976-10-23 Sony Corp An amplification circuit
JPS6115620Y2 (de) * 1976-03-02 1986-05-15
JPS5658303A (en) * 1979-10-18 1981-05-21 Sony Corp Amplifying circuit
JPS5723309A (en) * 1980-07-16 1982-02-06 Sanyo Electric Co Ltd Electric power amplifying circuit of pulse width modulation system
JPS5723310A (en) * 1980-07-17 1982-02-06 Sanyo Electric Co Ltd Electric power amplifier circuit of pulse width modulation system
JPS5732104A (en) * 1980-08-06 1982-02-20 Hitachi Ltd Power-voltage-controlled type amplifier
US4472687A (en) * 1980-12-24 1984-09-18 Tokyo Shibaura Denki Kabushiki Kaisha Audio power amplifier for supplying electric power to a load by switching of power supply voltage
JPS57140008A (en) * 1981-02-20 1982-08-30 Sanyo Electric Co Ltd Power amplifying circuit
JPS5814606A (ja) * 1981-07-18 1983-01-27 Pioneer Electronic Corp 増幅器の電源供給回路
JPS58105606A (ja) * 1981-12-17 1983-06-23 Pioneer Electronic Corp 増幅器の電源供給回路
JPS58119209A (ja) * 1982-01-11 1983-07-15 Hitachi Ltd 電源電圧制御型増幅器
JPS5917710A (ja) * 1982-07-22 1984-01-30 Toshiba Corp 電力増幅器
FR2552600A1 (fr) * 1983-09-27 1985-03-29 Commissariat Energie Atomique Amplificateur de puissance a alimentation asservie
JPH01147907A (ja) * 1987-12-04 1989-06-09 Oki Electric Ind Co Ltd 電力増幅回路

Also Published As

Publication number Publication date
EP0483094A2 (de) 1992-04-29
SE9003426L (sv) 1992-04-27
SE9003426D0 (sv) 1990-10-26
US5200711A (en) 1993-04-06
EP0483094B1 (de) 1997-08-20
DE69127340D1 (de) 1997-09-25
EP0483094A3 (en) 1992-12-09
DE69127340T2 (de) 1998-02-05

Similar Documents

Publication Publication Date Title
SE467331B (sv) Audio-effektfoerstaerkare med pulsbreddsmodulering samt ett audio-effektsteg
CN112954544B (zh) 驱动电路
US7167046B2 (en) Class-D amplifier
JP3899074B2 (ja) Ｐｗｍ負帰還によるデジタルｐｗｍ入力ｄ級音響増幅器
US5396194A (en) Audio frequency power amplifiers
US6665525B2 (en) High-level modulation method and apparatus
US4115739A (en) Power amplifier
KR0142149B1 (ko) 출력단에서의 직류 레벨이 자동 조정되는 차동 증폭 회로 및 btl 드라이버 회로를 반파로 드라이브 하는 전력 증폭 장치
KR100760024B1 (ko) 소프트 시작/정지 기능을 갖는 게이트 제어회로
US3939380A (en) Class D amplifier
US7683708B2 (en) Digital amplifier with analogue error correction circuit
EP0054943A1 (de) Leistungsverstärker, bei dem die Leistung von einer geschalteten Speisespannungsquelle an eine Last geliefert wird
US5852557A (en) Switching converter utilizing dual switch outputs
US4719431A (en) Audio power amplifier
US7106135B2 (en) Amplifier system and method
EP1220443B1 (de) xDSL Klasse C-AB Treiber
CN1714501A (zh) 脉冲调制功率转换器
US7545212B2 (en) Class ad audio amplifier
JPS6281804A (ja) 切換増幅器
CN101488730B (zh) 放大器、音频系统以及输入信号的放大方法
US10469042B1 (en) Audio amplifier circuit
US8410851B1 (en) Switching amplifier with an inductor
SU1083338A1 (ru) Усилитель мощности класса @
US20240243704A1 (en) Self-Oscillating Class D Audio Amplifier With Voltage Limiting Circuit
Class Power Amplifiers

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 9003426-5

Format of ref document f/p: F

NUG Patent has lapsed