JPS56100532A - Automatic gain control device - Google Patents

Automatic gain control device

Info

Publication number
JPS56100532A
JPS56100532A JP394080A JP394080A JPS56100532A JP S56100532 A JPS56100532 A JP S56100532A JP 394080 A JP394080 A JP 394080A JP 394080 A JP394080 A JP 394080A JP S56100532 A JPS56100532 A JP S56100532A
Authority
JP
Japan
Prior art keywords
signal
amplifier
level
input
detector
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
JP394080A
Other languages
Japanese (ja)
Other versions
JPS5854535B2 (en
Inventor
Takashi Kako
Shigeyuki Umigami
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP394080A priority Critical patent/JPS5854535B2/en
Publication of JPS56100532A publication Critical patent/JPS56100532A/en
Publication of JPS5854535B2 publication Critical patent/JPS5854535B2/en
Expired 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

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To make leading-in of the automatic gain control device stable, sure, and high-speed, by making the input signal range optimum by the amplification degree corresponding to the input signal level and by holding the control voltage of the amplifier in a certain level for no input. CONSTITUTION:Level detector 8 is operated according to output (b) of carrier detector 5 to detect the maximum level of input singal (a) and assignes it to a prescribed amplifier of amplifier group 9 for amplification or attenuation of signal (a), and the selected amplifier of amplifier group 9 amplifies or attenuates signal (a) to generate input signal (a') and outputs this signal. Oscillator 6 generates the signal of a prescribed level or less and is operated in respons to signal (b) of detector 5. Consequently, adder 7 sends only one of input signal (a) of the prescribed level or more and initializing signal (e) to voltage control amplifier 1.
JP394080A 1980-01-17 1980-01-17 automatic gain control device Expired JPS5854535B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP394080A JPS5854535B2 (en) 1980-01-17 1980-01-17 automatic gain control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP394080A JPS5854535B2 (en) 1980-01-17 1980-01-17 automatic gain control device

Publications (2)

Publication Number Publication Date
JPS56100532A true JPS56100532A (en) 1981-08-12
JPS5854535B2 JPS5854535B2 (en) 1983-12-05

Family

ID=11571120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP394080A Expired JPS5854535B2 (en) 1980-01-17 1980-01-17 automatic gain control device

Country Status (1)

Country Link
JP (1) JPS5854535B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057242U (en) * 1983-09-26 1985-04-22 カシオ計算機株式会社 data receiving circuit
JPS61103941U (en) * 1984-12-12 1986-07-02
JPS6447134A (en) * 1987-08-18 1989-02-21 Nec Corp Agc circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057242U (en) * 1983-09-26 1985-04-22 カシオ計算機株式会社 data receiving circuit
JPS61103941U (en) * 1984-12-12 1986-07-02
JPS6447134A (en) * 1987-08-18 1989-02-21 Nec Corp Agc circuit

Also Published As

Publication number Publication date
JPS5854535B2 (en) 1983-12-05

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