AU2002218614A1 - Amplifier circuit - Google Patents
Amplifier circuitInfo
- 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
Links
- 230000003321 amplification Effects 0.000 abstract 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 3
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.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0004433 | 2000-12-01 | ||
SE0004433A SE520436C2 (en) | 2000-12-01 | 2000-12-01 | amplifier |
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)
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)
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 |
-
2000
- 2000-12-01 SE SE0004433A patent/SE520436C2/en not_active IP Right Cessation
-
2001
- 2001-11-29 US US10/433,083 patent/US6864744B2/en not_active Expired - Lifetime
- 2001-11-29 AU AU2002218614A patent/AU2002218614A1/en not_active Abandoned
- 2001-11-29 AT AT01999040T patent/ATE385355T1/en not_active IP Right Cessation
- 2001-11-29 DE DE60132674T patent/DE60132674T2/en not_active Expired - Lifetime
- 2001-11-29 WO PCT/SE2001/002647 patent/WO2002045260A1/en active IP Right Grant
- 2001-11-29 EP EP01999040A patent/EP1346474B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
SE0004433D0 (en) | 2000-12-01 |
EP1346474B1 (en) | 2008-01-30 |
DE60132674T2 (en) | 2009-03-19 |
DE60132674D1 (en) | 2008-03-20 |
WO2002045260A1 (en) | 2002-06-06 |
EP1346474A1 (en) | 2003-09-24 |
US20040021513A1 (en) | 2004-02-05 |
SE0004433L (en) | 2002-06-02 |
SE520436C2 (en) | 2003-07-08 |
ATE385355T1 (en) | 2008-02-15 |
US6864744B2 (en) | 2005-03-08 |
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