JPS57147308A - Agc system of multichannel amplifier - Google Patents

Agc system of multichannel amplifier

Info

Publication number
JPS57147308A
JPS57147308A JP3303881A JP3303881A JPS57147308A JP S57147308 A JPS57147308 A JP S57147308A JP 3303881 A JP3303881 A JP 3303881A JP 3303881 A JP3303881 A JP 3303881A JP S57147308 A JPS57147308 A JP S57147308A
Authority
JP
Japan
Prior art keywords
channel signals
agc
voltage generating
variable gain
circuits
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
Application number
JP3303881A
Other languages
Japanese (ja)
Other versions
JPS6251521B2 (en
Inventor
Kazumi Nakayama
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.)
Maspro Denkoh Corp
Original Assignee
Maspro Denkoh Corp
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 Maspro Denkoh Corp filed Critical Maspro Denkoh Corp
Priority to JP3303881A priority Critical patent/JPS57147308A/en
Publication of JPS57147308A publication Critical patent/JPS57147308A/en
Publication of JPS6251521B2 publication Critical patent/JPS6251521B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To adjust an AGC voltage generating circuit at only one point by inputting different channel signals to a single AGC voltage generating circuit, and thus obtaining AGC voltages for the respective channel signals. CONSTITUTION:A signal inputted to a terminal 1 is amplified by a variable gain amplifying circuit 3 and then outputted through a mixing part 5. Individual channel signals outputted from the variable gain amplifying circuit 3 are inputted to the 1st signal switching part through a signal superposition part 11. The 1st signal switching part supplies one of those channel signals to AGC voltage generating circuits 15 and 16 successively. Generated AGC voltages are fed back to variable gain amplifying circuits 3 for amplifying the prescribed channel signals by the 2nd signal switching part 13. Those feedback paths are provided with circuits which hold the individual AGC voltages temporarily and while they are changed over successively, the AGC voltages are held.
JP3303881A 1981-03-06 1981-03-06 Agc system of multichannel amplifier Granted JPS57147308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3303881A JPS57147308A (en) 1981-03-06 1981-03-06 Agc system of multichannel amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3303881A JPS57147308A (en) 1981-03-06 1981-03-06 Agc system of multichannel amplifier

Publications (2)

Publication Number Publication Date
JPS57147308A true JPS57147308A (en) 1982-09-11
JPS6251521B2 JPS6251521B2 (en) 1987-10-30

Family

ID=12375613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3303881A Granted JPS57147308A (en) 1981-03-06 1981-03-06 Agc system of multichannel amplifier

Country Status (1)

Country Link
JP (1) JPS57147308A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154917U (en) * 1983-03-08 1984-10-17 八重洲無線株式会社 AGC circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154917U (en) * 1983-03-08 1984-10-17 八重洲無線株式会社 AGC circuit
JPH0127288Y2 (en) * 1983-03-08 1989-08-15

Also Published As

Publication number Publication date
JPS6251521B2 (en) 1987-10-30

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