JPS6477307A - Automatic gain control circuit - Google Patents
Automatic gain control circuitInfo
- Publication number
- JPS6477307A JPS6477307A JP23390387A JP23390387A JPS6477307A JP S6477307 A JPS6477307 A JP S6477307A JP 23390387 A JP23390387 A JP 23390387A JP 23390387 A JP23390387 A JP 23390387A JP S6477307 A JPS6477307 A JP S6477307A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- gain
- supplied
- level
- count value
- 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.)
- Pending
Links
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To simplify and miniaturize the constitution of the titled circuit by comparing the amplitude level of an output signal from a gain switching means with a reference level, counting up frequency generating level differences and controlling gain based upon the count value. CONSTITUTION:A reproduced signal supplied to an input terminal 18 is amplified by the gain switching circuit 19 with a prescribed gain and the amplified signal is fetched from an output terminal 20 and also supplied to a level detecting circuit 21. An envelope signal extracted by the circuit 21 is respectively supplied to a high level comparator 22 and low level comparator 23. A detecting pules outputted from the comparator 22 is supplied to a counter circuit 23, and when the count value is increased, the gain of the gain control circuit 19 is dropped. On the other hand, a detecting pulse outputted from the circuit 23 is supplied to a counter circuit 27, and when the count value is increased, the gain of the circuit 19 is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23390387A JPS6477307A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23390387A JPS6477307A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6477307A true JPS6477307A (en) | 1989-03-23 |
Family
ID=16962388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23390387A Pending JPS6477307A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6477307A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05251972A (en) * | 1992-03-06 | 1993-09-28 | Nec Corp | Automatic gain controller |
| JP2008118497A (en) * | 2006-11-07 | 2008-05-22 | Nippon Signal Co Ltd:The | Current mirror circuit, and gain control apparatus of current mirror circuit |
| JP2009105887A (en) * | 2007-10-23 | 2009-05-14 | Seiko Epson Corp | Automatic gain control circuit, gain control method of amplifier, detection method of locked state of amplifier in automatic gain control loop |
| JP2013225847A (en) * | 2012-03-19 | 2013-10-31 | National Institute Of Advanced Industrial & Technology | Method of varying gain of amplifying photoelectric conversion element, and variable gain photoelectric conversion element |
-
1987
- 1987-09-18 JP JP23390387A patent/JPS6477307A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05251972A (en) * | 1992-03-06 | 1993-09-28 | Nec Corp | Automatic gain controller |
| JP2008118497A (en) * | 2006-11-07 | 2008-05-22 | Nippon Signal Co Ltd:The | Current mirror circuit, and gain control apparatus of current mirror circuit |
| JP2009105887A (en) * | 2007-10-23 | 2009-05-14 | Seiko Epson Corp | Automatic gain control circuit, gain control method of amplifier, detection method of locked state of amplifier in automatic gain control loop |
| JP2013225847A (en) * | 2012-03-19 | 2013-10-31 | National Institute Of Advanced Industrial & Technology | Method of varying gain of amplifying photoelectric conversion element, and variable gain photoelectric conversion element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5728409A (en) | Muting circuit | |
| AU538058B2 (en) | Sound activated light switch | |
| CA2096549A1 (en) | Fire detector | |
| CA2042950A1 (en) | Automatic power control circuit for use with a radio telecommunication apparatus | |
| JPS6477307A (en) | Automatic gain control circuit | |
| JPS5672510A (en) | Muting circuit | |
| EP0329104A3 (en) | Image signal processor with noise elimination circuit | |
| JPS6447111A (en) | Agc circuit | |
| JPS56111111A (en) | Automatic recording level setter | |
| JPS562767A (en) | Impulsive noise eliminating circuit | |
| JPS5711515A (en) | Automatic gain control amplifier | |
| JPS56169969A (en) | Synchronisum separation circuit | |
| JPS56109012A (en) | Automatic gain control circuit | |
| JPS57212813A (en) | Automatic sound volume adjuster | |
| JPS55159608A (en) | Automatic gain control amplifier | |
| JPS5379314A (en) | Video signal processing circuit | |
| JPS6410736A (en) | Transmitter-receiver | |
| JPS5793795A (en) | Electronic signal controller | |
| JPS5753185A (en) | Detection circuit for television broadcast signal | |
| JPS6416111A (en) | Automatic gain control circuit | |
| JPS5440016A (en) | Fail soft receiving high frequency amplifier | |
| JPS57196676A (en) | Character broadcast receiver | |
| JPS6410737A (en) | Transmitter-receiver | |
| JPS56111110A (en) | Automatic recording level setter | |
| JPS57147382A (en) | Automatc gain control circuit of video signal |