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JPS5678210A - Automatic gain control amplifier - Google Patents

Automatic gain control amplifier

Info

Publication number
JPS5678210A
JPS5678210A JP15655879A JP15655879A JPS5678210A JP S5678210 A JPS5678210 A JP S5678210A JP 15655879 A JP15655879 A JP 15655879A JP 15655879 A JP15655879 A JP 15655879A JP S5678210 A JPS5678210 A JP S5678210A
Authority
JP
Japan
Prior art keywords
amplifier
gain control
automatic gain
gain
input
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
JP15655879A
Other languages
Japanese (ja)
Inventor
Yasunori Sakaguchi
Nobuharu Yazawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15655879A priority Critical patent/JPS5678210A/en
Publication of JPS5678210A publication Critical patent/JPS5678210A/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 obtain a detection output without hindrance even if a large input arrives suddenly, by controlling the output gain of an input amplifier by use of a rectified voltage. CONSTITUTION:An input signal, once applied to the input terminal, is amplified by amplifier 1 and the gain of amplifier 1 is controlled with a voltage rectified by rectifier 3. The signal amplified by amplifier 1, on the other hand, is AM-detected by AM detector 2 to obtain a detection output at output terminal 5. Therefore, even if a large input arrives suddenly, the voltage rectified by rectifier 3' can be obtained to control the gain of amplifier 1, so that the detection output can be obtained by AM detector 2 without hindrance.
JP15655879A 1979-11-29 1979-11-29 Automatic gain control amplifier Pending JPS5678210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15655879A JPS5678210A (en) 1979-11-29 1979-11-29 Automatic gain control amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15655879A JPS5678210A (en) 1979-11-29 1979-11-29 Automatic gain control amplifier

Publications (1)

Publication Number Publication Date
JPS5678210A true JPS5678210A (en) 1981-06-27

Family

ID=15630413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15655879A Pending JPS5678210A (en) 1979-11-29 1979-11-29 Automatic gain control amplifier

Country Status (1)

Country Link
JP (1) JPS5678210A (en)

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