JPS5595408A - Amplifier circuit with shock-sound prevention circuit - Google Patents

Amplifier circuit with shock-sound prevention circuit

Info

Publication number
JPS5595408A
JPS5595408A JP97579A JP97579A JPS5595408A JP S5595408 A JPS5595408 A JP S5595408A JP 97579 A JP97579 A JP 97579A JP 97579 A JP97579 A JP 97579A JP S5595408 A JPS5595408 A JP S5595408A
Authority
JP
Japan
Prior art keywords
circuit
switch
shock
amplifier circuit
shock sound
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
JP97579A
Other languages
Japanese (ja)
Inventor
Shigeru Nagasawa
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 JP97579A priority Critical patent/JPS5595408A/en
Publication of JPS5595408A publication Critical patent/JPS5595408A/en
Pending legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE: To make it possible to prevent a double-shock sound by temporarily stopping the functions of an amplifier circuit when the power supply is turned ON, by providing two start circuits.
CONSTITUTION: With a power switch ON, 1st and 2nd start circuits 5 and 6 start operating at the same time and transistor TRQ24 of a 1st constant-current circuit and TRQ18 of a 2nd constant-current circuit both turn OFF, so that a power amplifier circuit will stop to function. As a result, a voltage at output terminal 8 is free until capacitor C8 is charged by start circuit 6. Therefore, no steep waveform appears at terminal 8 until a set voltage with switch 9 ON, generating no shock sound. In addition, even turning switch 9 OFF and then ON causes no steep waveform to appear at terminal 8. In this way, a double-shock sound can completely be prevented from being generated during the continuous ON-OFF operation of switch 9.
COPYRIGHT: (C)1980,JPO&Japio
JP97579A 1979-01-11 1979-01-11 Amplifier circuit with shock-sound prevention circuit Pending JPS5595408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP97579A JPS5595408A (en) 1979-01-11 1979-01-11 Amplifier circuit with shock-sound prevention circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP97579A JPS5595408A (en) 1979-01-11 1979-01-11 Amplifier circuit with shock-sound prevention circuit

Publications (1)

Publication Number Publication Date
JPS5595408A true JPS5595408A (en) 1980-07-19

Family

ID=11488609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP97579A Pending JPS5595408A (en) 1979-01-11 1979-01-11 Amplifier circuit with shock-sound prevention circuit

Country Status (1)

Country Link
JP (1) JPS5595408A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080304A (en) * 1983-10-09 1985-05-08 Rohm Co Ltd Amplifier circuit
JPS6158303A (en) * 1984-08-29 1986-03-25 Sanyo Electric Co Ltd Preamplifier
JPS6232617U (en) * 1985-08-09 1987-02-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080304A (en) * 1983-10-09 1985-05-08 Rohm Co Ltd Amplifier circuit
JPH0518287B2 (en) * 1983-10-09 1993-03-11 Rohm Kk
JPS6158303A (en) * 1984-08-29 1986-03-25 Sanyo Electric Co Ltd Preamplifier
JPS6232617U (en) * 1985-08-09 1987-02-26

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