JPS5397312A - Muting circuit - Google Patents

Muting circuit

Info

Publication number
JPS5397312A
JPS5397312A JP1162477A JP1162477A JPS5397312A JP S5397312 A JPS5397312 A JP S5397312A JP 1162477 A JP1162477 A JP 1162477A JP 1162477 A JP1162477 A JP 1162477A JP S5397312 A JPS5397312 A JP S5397312A
Authority
JP
Japan
Prior art keywords
muting circuit
transistor
decrease
common
circuit
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
JP1162477A
Other languages
Japanese (ja)
Inventor
Yoshimi Iso
Isao Fukushima
Isao Akitake
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 JP1162477A priority Critical patent/JPS5397312A/en
Publication of JPS5397312A publication Critical patent/JPS5397312A/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
    • H03G3/34—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

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To decrease the number of the circuit component element by using the Schmitt trigger and the transistor for the variable resistance element in common.
JP1162477A 1977-02-07 1977-02-07 Muting circuit Pending JPS5397312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1162477A JPS5397312A (en) 1977-02-07 1977-02-07 Muting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1162477A JPS5397312A (en) 1977-02-07 1977-02-07 Muting circuit

Publications (1)

Publication Number Publication Date
JPS5397312A true JPS5397312A (en) 1978-08-25

Family

ID=11783070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1162477A Pending JPS5397312A (en) 1977-02-07 1977-02-07 Muting circuit

Country Status (1)

Country Link
JP (1) JPS5397312A (en)

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