JPS5490953A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5490953A
JPS5490953A JP15761277A JP15761277A JPS5490953A JP S5490953 A JPS5490953 A JP S5490953A JP 15761277 A JP15761277 A JP 15761277A JP 15761277 A JP15761277 A JP 15761277A JP S5490953 A JPS5490953 A JP S5490953A
Authority
JP
Japan
Prior art keywords
terminal
signal
fed
amplifier
output
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
JP15761277A
Other languages
Japanese (ja)
Inventor
Haruyasu Yamada
Toshiki Mori
Tsuneo Takezaki
Akira Tada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15761277A priority Critical patent/JPS5490953A/en
Publication of JPS5490953A publication Critical patent/JPS5490953A/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
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits

Abstract

PURPOSE:To reject the switching noise at operation and non-operation of the amplifier, by grounding the output terminal of amplifier in AC manner for a given time. CONSTITUTION:The selection signal b fed to the terminal 18 controls operation or non-operation of the reproduction amplifier 2, and the output at operation can be obtained at the terminal 16. In this case, the signal b is fed to the trigger pulse production circuits 22,23 and the trigger pulses e,f produced after a given time is fed to the blanking pulse production circuit 26. Further, the blanking pulse h responds to the signal b and controls the switch circuit 17, allowing to connect the output signal at the terminal 16 in AC manner. Further, when the ON and OFF signal of the power supply is fed to the terminal 19, the switch 17 is controlled similarly.
JP15761277A 1977-12-28 1977-12-28 Amplifier Pending JPS5490953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15761277A JPS5490953A (en) 1977-12-28 1977-12-28 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15761277A JPS5490953A (en) 1977-12-28 1977-12-28 Amplifier

Publications (1)

Publication Number Publication Date
JPS5490953A true JPS5490953A (en) 1979-07-19

Family

ID=15653524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15761277A Pending JPS5490953A (en) 1977-12-28 1977-12-28 Amplifier

Country Status (1)

Country Link
JP (1) JPS5490953A (en)

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