JPS5542429A - Muting circuit - Google Patents

Muting circuit

Info

Publication number
JPS5542429A
JPS5542429A JP11529678A JP11529678A JPS5542429A JP S5542429 A JPS5542429 A JP S5542429A JP 11529678 A JP11529678 A JP 11529678A JP 11529678 A JP11529678 A JP 11529678A JP S5542429 A JPS5542429 A JP S5542429A
Authority
JP
Japan
Prior art keywords
switch
contact
circuit
input end
pass
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
JP11529678A
Other languages
Japanese (ja)
Inventor
Fumimaro Hosoda
Masaichi Ishii
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11529678A priority Critical patent/JPS5542429A/en
Publication of JPS5542429A publication Critical patent/JPS5542429A/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 without distortion of the input signal
    • 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

Abstract

PURPOSE:To prevent occurrence of the abnormal tone assuredly through a simple constitution by driving the by-pass circuit with generation of the transient signal from the switch at the switch change-over time. CONSTITUTION:By-pass circuit 28 gives by-pass to the input signal supplied to the circuit system. At the same time, fixed contact S1 of the make and break switch is connected to the driving input end of circuit 28; contact S2 is connected to power input end; and switch contact S3 gives switching to fixed contacts S1 and S2. Here the transient signal generated when change-over switch S is switched from contact S2 to S1 is supplied to the driving input end of circuit 28 via contact S1. In this way, the abnormal tone can be prevented assuredly through a simple constitution.
JP11529678A 1978-09-20 1978-09-20 Muting circuit Pending JPS5542429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11529678A JPS5542429A (en) 1978-09-20 1978-09-20 Muting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11529678A JPS5542429A (en) 1978-09-20 1978-09-20 Muting circuit

Publications (1)

Publication Number Publication Date
JPS5542429A true JPS5542429A (en) 1980-03-25

Family

ID=14659126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11529678A Pending JPS5542429A (en) 1978-09-20 1978-09-20 Muting circuit

Country Status (1)

Country Link
JP (1) JPS5542429A (en)

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