AU2002218614A1 - Amplifier circuit - Google Patents

Amplifier circuit

Info

Publication number
AU2002218614A1
AU2002218614A1 AU2002218614A AU1861402A AU2002218614A1 AU 2002218614 A1 AU2002218614 A1 AU 2002218614A1 AU 2002218614 A AU2002218614 A AU 2002218614A AU 1861402 A AU1861402 A AU 1861402A AU 2002218614 A1 AU2002218614 A1 AU 2002218614A1
Authority
AU
Australia
Prior art keywords
amplifier circuit
unit
control
amplification
receive
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.)
Abandoned
Application number
AU2002218614A
Inventor
Gunnar Forsberg
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.)
Transmode Systems AB
Original Assignee
Transmode Systems AB
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 Transmode Systems AB filed Critical Transmode Systems AB
Publication of AU2002218614A1 publication Critical patent/AU2002218614A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

The invention concerns an amplifier circuit which comprises an amplifier unit (210) arranged to receive an input signal, to influence the amplification of this input signal and to transmit an output signal. The amplifier circuit also comprises a first control unit (210) and a second control unit (220). Those control units receive said output signal. Furthermore, the amplifier circuit comprises a selector unit (240) which is arranged to receive first and second control signals from the control units (310, 220). The selector unit (240) is arranged to control the amplification of the amplifier unit (201) in accordance with that one of said first and second control signals which gives the lowest amplification.
AU2002218614A 2000-12-01 2001-11-29 Amplifier circuit Abandoned AU2002218614A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0004433A SE520436C2 (en) 2000-12-01 2000-12-01 amplifier
SE0004433 2000-12-01
PCT/SE2001/002647 WO2002045260A1 (en) 2000-12-01 2001-11-29 Amplifier circuit

Publications (1)

Publication Number Publication Date
AU2002218614A1 true AU2002218614A1 (en) 2002-06-11

Family

ID=20282056

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002218614A Abandoned AU2002218614A1 (en) 2000-12-01 2001-11-29 Amplifier circuit

Country Status (7)

Country Link
US (1) US6864744B2 (en)
EP (1) EP1346474B1 (en)
AT (1) ATE385355T1 (en)
AU (1) AU2002218614A1 (en)
DE (1) DE60132674T2 (en)
SE (1) SE520436C2 (en)
WO (1) WO2002045260A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105099385B (en) * 2015-08-24 2018-07-10 上海艾为电子技术股份有限公司 Gain control circuit and audio frequency apparatus

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62140507A (en) * 1985-12-13 1987-06-24 Oki Electric Ind Co Ltd Automatic gain control amplifier for offset compensation
GB2209444B (en) * 1987-07-21 1992-03-18 Plessey Co Plc Improvements in or relating to amplifiers
US5339454A (en) * 1991-08-05 1994-08-16 Ford Motor Company Automatic gain control for RF amplifier
JP2713224B2 (en) * 1995-05-01 1998-02-16 日本電気株式会社 Optical receiver
JPH11275021A (en) * 1998-03-20 1999-10-08 Fujitsu Ltd Optical amplifier
JP2000151432A (en) 1998-11-10 2000-05-30 Hitachi Denshi Ltd Radio transmission equipment
JP2000154132A (en) * 1998-11-19 2000-06-06 Shiseido Co Ltd Antiaging agent
JP2000307363A (en) * 1999-04-16 2000-11-02 Hitachi Denshi Ltd Radio transmission equipment
JP2001024454A (en) * 1999-07-07 2001-01-26 Matsushita Electric Ind Co Ltd Automatic gain controller and its method and radio communication apparatus having automatic gain control function
JP4299416B2 (en) * 1999-10-18 2009-07-22 株式会社ルネサステクノロジ Peak detection type AGC circuit
JP2001230644A (en) * 2000-02-18 2001-08-24 Matsushita Electric Ind Co Ltd Device and method for automatically controlling gain and radio communications equipment provided with automatic gain control function

Also Published As

Publication number Publication date
DE60132674D1 (en) 2008-03-20
US20040021513A1 (en) 2004-02-05
SE520436C2 (en) 2003-07-08
WO2002045260A1 (en) 2002-06-06
EP1346474A1 (en) 2003-09-24
SE0004433L (en) 2002-06-02
DE60132674T2 (en) 2009-03-19
SE0004433D0 (en) 2000-12-01
US6864744B2 (en) 2005-03-08
ATE385355T1 (en) 2008-02-15
EP1346474B1 (en) 2008-01-30

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