JPS5429911A - Gain control circuit - Google Patents

Gain control circuit

Info

Publication number
JPS5429911A
JPS5429911A JP9508077A JP9508077A JPS5429911A JP S5429911 A JPS5429911 A JP S5429911A JP 9508077 A JP9508077 A JP 9508077A JP 9508077 A JP9508077 A JP 9508077A JP S5429911 A JPS5429911 A JP S5429911A
Authority
JP
Japan
Prior art keywords
control circuit
gain control
listner
discordant
muting
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
JP9508077A
Other languages
Japanese (ja)
Other versions
JPS6041894B2 (en
Inventor
Masanori Ienaka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9508077A priority Critical patent/JPS6041894B2/en
Publication of JPS5429911A publication Critical patent/JPS5429911A/en
Publication of JPS6041894B2 publication Critical patent/JPS6041894B2/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
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • 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
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To make a listner recognize the channel selecting state by controlling the output of an audio amplifier circuit by an emitter follower circuit in a FM tuner so that the muting attenuation quantity may be set to the degree where the noise is not discordant.
JP9508077A 1977-08-10 1977-08-10 gain control circuit Expired JPS6041894B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9508077A JPS6041894B2 (en) 1977-08-10 1977-08-10 gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9508077A JPS6041894B2 (en) 1977-08-10 1977-08-10 gain control circuit

Publications (2)

Publication Number Publication Date
JPS5429911A true JPS5429911A (en) 1979-03-06
JPS6041894B2 JPS6041894B2 (en) 1985-09-19

Family

ID=14127966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9508077A Expired JPS6041894B2 (en) 1977-08-10 1977-08-10 gain control circuit

Country Status (1)

Country Link
JP (1) JPS6041894B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02105094A (en) * 1988-10-14 1990-04-17 Seiko Electronic Components Ltd Moving table for vacuum chamber

Also Published As

Publication number Publication date
JPS6041894B2 (en) 1985-09-19

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