JPS5595408A - Amplifier circuit with shock-sound prevention circuit - Google Patents
Amplifier circuit with shock-sound prevention circuitInfo
- 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
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
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)
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 |
-
1979
- 1979-01-11 JP JP97579A patent/JPS5595408A/en active Pending
Cited By (4)
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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