IT1237511B - Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso - Google Patents

Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso

Info

Publication number
IT1237511B
IT1237511B IT02222689A IT2222689A IT1237511B IT 1237511 B IT1237511 B IT 1237511B IT 02222689 A IT02222689 A IT 02222689A IT 2222689 A IT2222689 A IT 2222689A IT 1237511 B IT1237511 B IT 1237511B
Authority
IT
Italy
Prior art keywords
switching
input signal
high efficiency
amplification circuit
operating status
Prior art date
Application number
IT02222689A
Other languages
English (en)
Other versions
IT8922226A0 (it
IT8922226A1 (it
Inventor
Aldo Torazzina
Original Assignee
Sgs Thomson Microelectronics
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 Sgs Thomson Microelectronics filed Critical Sgs Thomson Microelectronics
Priority to IT02222689A priority Critical patent/IT1237511B/it
Publication of IT8922226A0 publication Critical patent/IT8922226A0/it
Priority to EP19900119721 priority patent/EP0425878A3/en
Priority to US07/602,106 priority patent/US5101170A/en
Priority to KR1019900017741A priority patent/KR910008937A/ko
Priority to JP2295167A priority patent/JPH03155207A/ja
Publication of IT8922226A1 publication Critical patent/IT8922226A1/it
Application granted granted Critical
Publication of IT1237511B publication Critical patent/IT1237511B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • 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
    • H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/468—Indexing scheme relating to amplifiers the temperature being sensed

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
IT02222689A 1989-10-31 1989-10-31 Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso IT1237511B (it)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT02222689A IT1237511B (it) 1989-10-31 1989-10-31 Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso
EP19900119721 EP0425878A3 (en) 1989-10-31 1990-10-15 High-efficiency audio amplifier
US07/602,106 US5101170A (en) 1989-10-31 1990-10-22 High-efficiency audio amplifier
KR1019900017741A KR910008937A (ko) 1989-10-31 1990-10-31 고효율 오디오 증폭기
JP2295167A JPH03155207A (ja) 1989-10-31 1990-10-31 オーディオ増幅回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT02222689A IT1237511B (it) 1989-10-31 1989-10-31 Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso

Publications (3)

Publication Number Publication Date
IT8922226A0 IT8922226A0 (it) 1989-10-31
IT8922226A1 IT8922226A1 (it) 1991-05-01
IT1237511B true IT1237511B (it) 1993-06-08

Family

ID=11193333

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02222689A IT1237511B (it) 1989-10-31 1989-10-31 Circuito di amplificazione audio ad alta efficenza, con commutazione dello stato di funzionamento in funzione del segnale d'ingresso

Country Status (5)

Country Link
US (1) US5101170A (it)
EP (1) EP0425878A3 (it)
JP (1) JPH03155207A (it)
KR (1) KR910008937A (it)
IT (1) IT1237511B (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0613242B1 (en) * 1993-02-24 1997-10-29 STMicroelectronics S.r.l. Self-configurable dual bridge power amplifier
GB2287147A (en) * 1994-02-26 1995-09-06 Motorola Inc Bridge circuit for driving a loudspeaker either from one end to earth or from both ends
US5471175A (en) * 1994-08-24 1995-11-28 National Semiconductor Corporation Input protection circuit for a CMOS comparator
DE19525411A1 (de) * 1995-07-12 1997-01-16 Philips Patentverwaltung Signalverstärker
EP0855101B1 (en) * 1996-08-09 2005-09-07 Koninklijke Philips Electronics N.V. An amplifier and a method for detecting the presence of a load
JP2003318658A (ja) * 2002-04-23 2003-11-07 Sanyo Electric Co Ltd ショック音防止回路
JP2003318656A (ja) * 2002-04-23 2003-11-07 Sanyo Electric Co Ltd ショック音防止回路
EP1487100A1 (en) 2003-06-09 2004-12-15 STMicroelectronics S.r.l. Multi-channel power amplifier with channels independently self-configuring bridge or single-ended output, particulary for audio applications
EP1496611A1 (en) 2003-07-09 2005-01-12 STMicroelectronics S.r.l. Multi-channel power amplifier self-configuring to a bridge or single-ended output, particularly for audio applications
JPWO2005046054A1 (ja) * 2003-11-11 2007-05-24 富士通株式会社 半導体装置、無線端末装置及び無線通信機器
US8330539B2 (en) * 2009-08-14 2012-12-11 Nxp B.V. Dynamic switchable mode dual bridge power amplifier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460070A1 (fr) * 1979-06-27 1981-01-16 Thomson Csf Dispositif amplificateur pour audio-frequences
JPS59174005A (ja) * 1983-03-24 1984-10-02 Nippon Gakki Seizo Kk 電力増幅器
DE3622713A1 (de) * 1986-07-05 1988-01-07 Blaupunkt Werke Gmbh Schaltungsanordnung mit einer brueckenendstufe

Also Published As

Publication number Publication date
KR910008937A (ko) 1991-05-31
JPH03155207A (ja) 1991-07-03
IT8922226A0 (it) 1989-10-31
EP0425878A3 (en) 1991-09-11
EP0425878A2 (en) 1991-05-08
US5101170A (en) 1992-03-31
IT8922226A1 (it) 1991-05-01

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971030