JPS5679510A - Automatic gain control circuit - Google Patents

Automatic gain control circuit

Info

Publication number
JPS5679510A
JPS5679510A JP15640879A JP15640879A JPS5679510A JP S5679510 A JPS5679510 A JP S5679510A JP 15640879 A JP15640879 A JP 15640879A JP 15640879 A JP15640879 A JP 15640879A JP S5679510 A JPS5679510 A JP S5679510A
Authority
JP
Japan
Prior art keywords
output
level
control circuit
gain control
automatic gain
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
JP15640879A
Other languages
Japanese (ja)
Inventor
Kunihiro Yamada
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15640879A priority Critical patent/JPS5679510A/en
Publication of JPS5679510A publication Critical patent/JPS5679510A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
    • 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

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To make tracking speed high without losing the control accuracy and stability, by providing the means to produce the overflow output when the output signal exceeds a prescribed range. CONSTITUTION:When an input signal x(t) is fed, the level of the output P is increased since the gain of an amplifier 16 is set at first at maximum value, and when it exceeds a prescribed limit level, the logic 1 is output to a down counter 17 as an overflow output from an overflow output circuit 26. Thus, 1 is count down by the next clock signal at the down counter 17, the gain of the amplifier 16 is lowered by one stage, Similarly, the level of the amplified output signal P is converged in the range of +Th and -Th.
JP15640879A 1979-12-04 1979-12-04 Automatic gain control circuit Pending JPS5679510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15640879A JPS5679510A (en) 1979-12-04 1979-12-04 Automatic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15640879A JPS5679510A (en) 1979-12-04 1979-12-04 Automatic gain control circuit

Publications (1)

Publication Number Publication Date
JPS5679510A true JPS5679510A (en) 1981-06-30

Family

ID=15627084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15640879A Pending JPS5679510A (en) 1979-12-04 1979-12-04 Automatic gain control circuit

Country Status (1)

Country Link
JP (1) JPS5679510A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789615U (en) * 1980-11-18 1982-06-02
JPS63147021U (en) * 1987-03-17 1988-09-28
JP2005524325A (en) * 2002-04-30 2005-08-11 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Digital automatic gain control for transceivers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229940A (en) * 1975-09-03 1977-03-07 Mitsubishi Electric Corp Analog to digital converter for protection relay apparatus
JPS5467362A (en) * 1977-11-08 1979-05-30 Standard Kogyo Kk Pcm system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229940A (en) * 1975-09-03 1977-03-07 Mitsubishi Electric Corp Analog to digital converter for protection relay apparatus
JPS5467362A (en) * 1977-11-08 1979-05-30 Standard Kogyo Kk Pcm system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789615U (en) * 1980-11-18 1982-06-02
JPS6222566Y2 (en) * 1980-11-18 1987-06-09
JPS63147021U (en) * 1987-03-17 1988-09-28
JP2005524325A (en) * 2002-04-30 2005-08-11 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Digital automatic gain control for transceivers

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