JPS55161407A - Agc circuit of shf receiver and so on - Google Patents

Agc circuit of shf receiver and so on

Info

Publication number
JPS55161407A
JPS55161407A JP6854879A JP6854879A JPS55161407A JP S55161407 A JPS55161407 A JP S55161407A JP 6854879 A JP6854879 A JP 6854879A JP 6854879 A JP6854879 A JP 6854879A JP S55161407 A JPS55161407 A JP S55161407A
Authority
JP
Japan
Prior art keywords
signal
circuit
agc
agc circuit
constitution
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
JP6854879A
Other languages
Japanese (ja)
Inventor
Takao Nakao
Makoto Takao
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP6854879A priority Critical patent/JPS55161407A/en
Publication of JPS55161407A publication Critical patent/JPS55161407A/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)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To simplify a circuit constitution, by clipping the intermediate frequency signal and by controlling the gain by an AGC signal corresponding to the output level. CONSTITUTION:The second IF signal obtained by mixing the oscillated signal of a local oscillator and the signal obtained by converting the SHF signal from a satellite is input to AGC circuit 6. The second IF signal has the upper half or the lower half clipped by the second IF tuning amplifier 18 and clip circuit 19 and has amplitude fluctuation components detected through integrating circuit 20 and is amplified by DC amplifier 21 and is converted to an AGC voltage. Gain control is performed by this AGC voltage.
JP6854879A 1979-05-31 1979-05-31 Agc circuit of shf receiver and so on Pending JPS55161407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6854879A JPS55161407A (en) 1979-05-31 1979-05-31 Agc circuit of shf receiver and so on

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6854879A JPS55161407A (en) 1979-05-31 1979-05-31 Agc circuit of shf receiver and so on

Publications (1)

Publication Number Publication Date
JPS55161407A true JPS55161407A (en) 1980-12-16

Family

ID=13376913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6854879A Pending JPS55161407A (en) 1979-05-31 1979-05-31 Agc circuit of shf receiver and so on

Country Status (1)

Country Link
JP (1) JPS55161407A (en)

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