FR2403683A1 - Circuit de detection de surcharge pour amplificateur de type pwm - Google Patents

Circuit de detection de surcharge pour amplificateur de type pwm

Info

Publication number
FR2403683A1
FR2403683A1 FR7826989A FR7826989A FR2403683A1 FR 2403683 A1 FR2403683 A1 FR 2403683A1 FR 7826989 A FR7826989 A FR 7826989A FR 7826989 A FR7826989 A FR 7826989A FR 2403683 A1 FR2403683 A1 FR 2403683A1
Authority
FR
France
Prior art keywords
detection circuit
type amplifier
overload detection
pwm type
detector
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
FR7826989A
Other languages
English (en)
Other versions
FR2403683B1 (fr
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
Publication of FR2403683A1 publication Critical patent/FR2403683A1/fr
Application granted granted Critical
Publication of FR2403683B1 publication Critical patent/FR2403683B1/fr
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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/426—Indexing scheme relating to amplifiers the amplifier comprising circuitry for protection against overload

Landscapes

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

Abstract

a. Circuit de détection de surcharge pour amplificateur de type PWM. b. Détecteur caractérisé en ce que le circuit comporte en outre un redresseur relié au second détecteur et dont la constante de temps de décharge est déterminée par la fréquence de coupure du filtre passe-bas, ainsi qu'un premier comparateur pour comparer les signaux de sortie du premier détecteur et du premier redresseur et donner un signal indicateur de surcharge suivant le résultat de la comparaison.
FR7826989A 1977-09-20 1978-09-20 Circuit de detection de surcharge pour amplificateur de type pwm Granted FR2403683A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52112912A JPS6047771B2 (ja) 1977-09-20 1977-09-20 増幅器の過負荷保護装置

Publications (2)

Publication Number Publication Date
FR2403683A1 true FR2403683A1 (fr) 1979-04-13
FR2403683B1 FR2403683B1 (fr) 1983-11-18

Family

ID=14598590

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826989A Granted FR2403683A1 (fr) 1977-09-20 1978-09-20 Circuit de detection de surcharge pour amplificateur de type pwm

Country Status (7)

Country Link
US (1) US4173739A (fr)
JP (1) JPS6047771B2 (fr)
AU (1) AU520901B2 (fr)
DE (1) DE2840778A1 (fr)
FR (1) FR2403683A1 (fr)
GB (1) GB2005506B (fr)
NL (1) NL188317C (fr)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330686A (en) * 1978-12-21 1982-05-18 Stephen Roe Loudspeaker systems
US4402029A (en) * 1979-06-15 1983-08-30 Matsushita Electric Industrial Co., Ltd. Protective circuit for output transformer-less circuit
US4494164A (en) * 1982-04-02 1985-01-15 Ampex Corporation Overload protection device
JPS58196704A (ja) * 1982-05-11 1983-11-16 Nippon Gakki Seizo Kk 電力増幅器の出力制限回路
US4509101A (en) * 1982-08-24 1985-04-02 Nippon Gakki Seizo Kabushiki Kaisha Protection circuit for switching power amplifier
US4727874A (en) * 1984-09-10 1988-03-01 C. R. Bard, Inc. Electrosurgical generator with high-frequency pulse width modulated feedback power control
US4723292A (en) * 1986-08-27 1988-02-02 Reen Corporation Voice evacuation system
US4992749A (en) * 1988-12-28 1991-02-12 Pioneer Electronic Corporation Pulse-width modulating amplifier circuit
JPH0794958A (ja) * 1993-09-20 1995-04-07 Pioneer Electron Corp 電力増幅器の過負荷検出回路
US6346778B1 (en) * 1998-01-20 2002-02-12 Bytecraft Pty Ltd AC power converter
US6469919B1 (en) 1999-07-22 2002-10-22 Eni Technology, Inc. Power supplies having protection circuits
US7180758B2 (en) * 1999-07-22 2007-02-20 Mks Instruments, Inc. Class E amplifier with inductive clamp
US7580532B2 (en) * 2002-08-06 2009-08-25 Lg Electronics Inc. Multi-channel pulse width modulation apparatus
JP2006060278A (ja) * 2004-08-17 2006-03-02 Yamaha Corp デジタルアンプの保護回路
US7394312B2 (en) * 2004-11-15 2008-07-01 Pioneer Corporation Re-configurable amplifier protection apparatus and method
CN101160717A (zh) * 2005-04-15 2008-04-09 皇家飞利浦电子股份有限公司 D类放大器
JP5109243B2 (ja) * 2005-09-05 2012-12-26 ソニー株式会社 ショート検出回路
EP1962419B1 (fr) * 2005-09-28 2013-01-16 Yamaha Corporation Amplificateur de classe D
KR20070113434A (ko) * 2006-05-23 2007-11-29 삼성전자주식회사 입력이득 자동 제어회로 및 그 방법
WO2010144813A1 (fr) 2009-06-11 2010-12-16 Raytheon Sarcos, Llc Procédé et système de déploiement d'un réseau de surveillance
US8344801B2 (en) 2010-04-02 2013-01-01 Mks Instruments, Inc. Variable class characteristic amplifier
US9214901B2 (en) 2012-07-27 2015-12-15 Mks Instruments, Inc. Wideband AFT power amplifier systems with frequency-based output transformer impedance balancing
US9031698B2 (en) 2012-10-31 2015-05-12 Sarcos Lc Serpentine robotic crawler
US10985707B2 (en) * 2017-12-04 2021-04-20 Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi Active limiting system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2083614A1 (fr) * 1970-03-26 1971-12-17 Sony Corp
FR2237342A1 (fr) * 1973-07-12 1975-02-07 Sony Corp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526846A (en) * 1967-07-13 1970-09-01 Mcintosh Lab Inc Protective circuitry for high fidelity amplifier
US3998694A (en) * 1972-03-27 1976-12-21 The Pioneer Educational Society Nuclear reactor and production systems with digital controls
CA1022467A (fr) * 1974-05-21 1977-12-13 Toshihiko Miyata Circuit de protection de charge
JPS5168758A (en) * 1974-12-11 1976-06-14 Sony Corp Zofukukairono hogokairo
US4047120A (en) * 1976-07-15 1977-09-06 The United States Of America As Represented By The Secretary Of The Navy Transient suppression circuit for push-pull switching amplifiers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2083614A1 (fr) * 1970-03-26 1971-12-17 Sony Corp
FR2237342A1 (fr) * 1973-07-12 1975-02-07 Sony Corp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/71 *

Also Published As

Publication number Publication date
NL7809578A (nl) 1979-03-22
DE2840778A1 (de) 1979-03-29
GB2005506A (en) 1979-04-19
JPS6047771B2 (ja) 1985-10-23
FR2403683B1 (fr) 1983-11-18
GB2005506B (en) 1982-04-07
DE2840778C2 (fr) 1989-05-11
AU520901B2 (en) 1982-03-04
NL188317B (nl) 1991-12-16
AU3990978A (en) 1980-03-20
JPS5446451A (en) 1979-04-12
US4173739A (en) 1979-11-06
NL188317C (nl) 1992-05-18

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Legal Events

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ST Notification of lapse