JPS6490605A - Agc circuit - Google Patents
Agc circuitInfo
- Publication number
- JPS6490605A JPS6490605A JP62249013A JP24901387A JPS6490605A JP S6490605 A JPS6490605 A JP S6490605A JP 62249013 A JP62249013 A JP 62249013A JP 24901387 A JP24901387 A JP 24901387A JP S6490605 A JPS6490605 A JP S6490605A
- Authority
- JP
- Japan
- Prior art keywords
- input
- output
- circuit
- resistor
- operational amplifier
- 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
Links
Landscapes
- Facsimile Image Signal Circuits (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To facilitate maintenance with low cost by employing no operational amplifier for the input and output of an AGC circuit and coupling them by a capacitor and a resistor so as to eliminate the time delay of the input and output thereby reducing number of components and simplifying the circuit. CONSTITUTION:An output voltage detected by a peak hold circuit 15 is connected to a noninverting input of an operational amplifier IC 5 and a reference voltage set optionally is inputted to an inverting input. A resistor R24 is provided, which is connected in parallel with a capacitor C8 and in series with a CdS element R30 in a photocoupler PTC1 including a light emitting diode controlled by an output current of a voltage current conversion circuit 18 receiving the output as the input. The connecting point between the CdS element and the resistor R24 is connected to the input of the circuit 15 and used as an output B and the other terminal of the resistor R24 is used as the input A. Thus, the AGC circuit not employing the operational amplifier is obtained for the input and output parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62249013A JP2585630B2 (en) | 1987-09-30 | 1987-09-30 | AGC circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62249013A JP2585630B2 (en) | 1987-09-30 | 1987-09-30 | AGC circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6490605A true JPS6490605A (en) | 1989-04-07 |
JP2585630B2 JP2585630B2 (en) | 1997-02-26 |
Family
ID=17186707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62249013A Expired - Lifetime JP2585630B2 (en) | 1987-09-30 | 1987-09-30 | AGC circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2585630B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030075709A (en) * | 2002-03-20 | 2003-09-26 | 현대모비스 주식회사 | A vehicle's air-vent which can be disassembled easily |
KR100423330B1 (en) * | 2001-12-13 | 2004-03-18 | 현대자동차주식회사 | a preventing structure of whistle noise by vent door of air duct in vehicles |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58161319U (en) * | 1982-04-23 | 1983-10-27 | 株式会社東芝 | AGC amplifier circuit |
JPS61198907A (en) * | 1985-02-28 | 1986-09-03 | Ricoh Co Ltd | Automatic gain controller |
-
1987
- 1987-09-30 JP JP62249013A patent/JP2585630B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58161319U (en) * | 1982-04-23 | 1983-10-27 | 株式会社東芝 | AGC amplifier circuit |
JPS61198907A (en) * | 1985-02-28 | 1986-09-03 | Ricoh Co Ltd | Automatic gain controller |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100423330B1 (en) * | 2001-12-13 | 2004-03-18 | 현대자동차주식회사 | a preventing structure of whistle noise by vent door of air duct in vehicles |
KR20030075709A (en) * | 2002-03-20 | 2003-09-26 | 현대모비스 주식회사 | A vehicle's air-vent which can be disassembled easily |
Also Published As
Publication number | Publication date |
---|---|
JP2585630B2 (en) | 1997-02-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3565328D1 (en) | Integrated constant-current source | |
JPS57173220A (en) | Comparator circuit | |
ATE128244T1 (en) | CIRCUIT FOR ELECTROMAGNETIC ROTATION SENSOR. | |
DE3584055D1 (en) | IMAGE SIGNAL COMPRESSION CIRCUIT. | |
JPS6490605A (en) | Agc circuit | |
JPS56164605A (en) | Multistage amplifying circuit | |
EP0202601A3 (en) | Optical pulse receiving circuit | |
JPS56111314A (en) | Wind comparator | |
JPS533767A (en) | Input-output-insulation circuit using photocoupler | |
JPS5755426A (en) | Direct current power supply circuit | |
JPS6411406A (en) | Voltage/current converting circuit | |
JPS5619450A (en) | Smoke sensor | |
JPS5537954A (en) | Photometry circuit of camera | |
JPS5730412A (en) | Voltage comparison circuit | |
JPS575410A (en) | Equalizer amplifier | |
JPS6418317A (en) | Digital-analog converter circuit | |
JPS5473547A (en) | Integrating a/d conversion current circuit | |
JPS5795714A (en) | Delay circuit | |
JPS57113123A (en) | Soft-starting circuit for constant-current power source | |
JPS55123175A (en) | Light receiver-amplifier circuit | |
EP0600091A4 (en) | Digital signal receiver. | |
JPS5718090A (en) | Charge sensing and amplifying circuit | |
JPS6461619A (en) | Photoelectric converting device | |
JPS54139361A (en) | Amplifier circuit having polygonal line characteristic | |
JPS56160125A (en) | Cyclic transversal filter |