JPS56102108A - Automatic gain controller - Google Patents

Automatic gain controller

Info

Publication number
JPS56102108A
JPS56102108A JP486680A JP486680A JPS56102108A JP S56102108 A JPS56102108 A JP S56102108A JP 486680 A JP486680 A JP 486680A JP 486680 A JP486680 A JP 486680A JP S56102108 A JPS56102108 A JP S56102108A
Authority
JP
Japan
Prior art keywords
circuit
time
prescribed
holding part
level
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
Application number
JP486680A
Other languages
Japanese (ja)
Inventor
Akira Takayoshi
Yoshio Mochida
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP486680A priority Critical patent/JPS56102108A/en
Publication of JPS56102108A publication Critical patent/JPS56102108A/en
Pending 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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To make it possible to set a recording level to the most suitable one for digital purpose, by detecting distortion elements of a transmission system through operation of an automatically set switch, and controlling the level of transmission signal. CONSTITUTION:When the operator depresses automatically set switch 12, time set circuit 10 is immediately driven and generates a pulse of time width corresponding to a prescribed set time, and the pulse is sent to maximum value holding part 9. Holding part 9 holds the maximum one out of the levels of waveform distortion elements detected by level detector 8 within the time set by circuit 10 and supplies the control signal corresponding to it to gain control circuit 3. Initial value set circuit 11 sets the gain of circuit 3 with a prescribed initial value for a prescribed time set by circuit 10 and with the maximum value held by holding part 9 after the prescribed time has passed, respectively. Therefore, circuit 3 can be set at the most suitable recording level for digital purpose.
JP486680A 1980-01-18 1980-01-18 Automatic gain controller Pending JPS56102108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP486680A JPS56102108A (en) 1980-01-18 1980-01-18 Automatic gain controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP486680A JPS56102108A (en) 1980-01-18 1980-01-18 Automatic gain controller

Publications (1)

Publication Number Publication Date
JPS56102108A true JPS56102108A (en) 1981-08-15

Family

ID=11595586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP486680A Pending JPS56102108A (en) 1980-01-18 1980-01-18 Automatic gain controller

Country Status (1)

Country Link
JP (1) JPS56102108A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231506A (en) * 1988-07-20 1990-02-01 Victor Co Of Japan Ltd Automatic setting device for sound recording level
JPH0272707A (en) * 1988-09-08 1990-03-13 Matsushita Electric Ind Co Ltd Automatic amplitude setting circuit
JPH0454716A (en) * 1990-06-25 1992-02-21 Nec Corp Agc circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0231506A (en) * 1988-07-20 1990-02-01 Victor Co Of Japan Ltd Automatic setting device for sound recording level
JPH0272707A (en) * 1988-09-08 1990-03-13 Matsushita Electric Ind Co Ltd Automatic amplitude setting circuit
JPH0454716A (en) * 1990-06-25 1992-02-21 Nec Corp Agc circuit

Similar Documents

Publication Publication Date Title
ES489554A1 (en) Waveform correction circuit.
JPS56102108A (en) Automatic gain controller
JPS5386101A (en) Automatic telephone reply recording device equipment with remote controller
JPS5219925A (en) Memory unit
JPS56140789A (en) Color balance control circuit
JPS56169406A (en) Level adjuster
JPS56111111A (en) Automatic recording level setter
JPS5687206A (en) Automatic recording level setter
JPS5385108A (en) Automatic gain control system
JPS5644106A (en) Tape recorder
JPS554759A (en) Signal level setting device
JPS5644108A (en) Tape recorder
JPS5644107A (en) Tape recorder
JPS5784242A (en) Automatic winker cancelling apparatus
JPS52100862A (en) Automatic gain control unit
JPS53131374A (en) Abnormality detecting apparatus of automatic control apparatus
JPS56111110A (en) Automatic recording level setter
JPS53110352A (en) Automatic gain control circuit
JPS5684013A (en) Automatic level regulator for sound signal
JPS5257481A (en) Automatic controlling equipment
JPS5379314A (en) Video signal processing circuit
JPS54110421A (en) Chopper controller
JPS5752209A (en) Automatic gain control system
JPS57129015A (en) Automatic waveform equalizing device
JPS5652917A (en) Automatic sound recording level adjusting device