JPS5750105A - Amplifier - Google Patents
AmplifierInfo
- Publication number
- JPS5750105A JPS5750105A JP55125753A JP12575380A JPS5750105A JP S5750105 A JPS5750105 A JP S5750105A JP 55125753 A JP55125753 A JP 55125753A JP 12575380 A JP12575380 A JP 12575380A JP S5750105 A JPS5750105 A JP S5750105A
- Authority
- JP
- Japan
- Prior art keywords
- state
- power supply
- same time
- steady
- shock noise
- 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)
Abstract
PURPOSE: To prevent the transmission of shock noise externally and the production of shock noise internally, by providing a switching circuit having a time constant which makes a stop state for a prescribed time at power supply on or off.
CONSTITUTION: After the shocking noise period from the prestage is finished and the state enters a steady-state, when switches S1, S2 turn off, current sources 12, 13 constituting differential amplifying stage transistors (TR) Q3, Q4 being the output stage and a current Miller circuit 12 start operation at the same time. Since the TRs Q1, Q2 enter the operating state already, the operation of the TRQ3 and the current source I2 enter the steady state at the same time. In this case, since the output terminal at the steady state is at zero potential with a balance adjusting circuit 14, no variation of the DC potential is caused. Further, at the stop of power supply, when the switched S1, S2 are turned on at the same time with the power supply turned off, the production of shock noise can be prevented similarly.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55125753A JPS5750105A (en) | 1980-09-10 | 1980-09-10 | Amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55125753A JPS5750105A (en) | 1980-09-10 | 1980-09-10 | Amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5750105A true JPS5750105A (en) | 1982-03-24 |
Family
ID=14917954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55125753A Pending JPS5750105A (en) | 1980-09-10 | 1980-09-10 | Amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750105A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198907A (en) * | 1982-05-17 | 1983-11-19 | Pioneer Electronic Corp | Malfunction preventing circuit of muting amplifier |
| US6876180B2 (en) | 2001-11-12 | 2005-04-05 | Denso Corporation | Power supply circuit having a start up circuit |
| JP2008204695A (en) * | 2007-02-19 | 2008-09-04 | Matsushita Electric Works Ltd | Illumination device |
-
1980
- 1980-09-10 JP JP55125753A patent/JPS5750105A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198907A (en) * | 1982-05-17 | 1983-11-19 | Pioneer Electronic Corp | Malfunction preventing circuit of muting amplifier |
| JPH0342522B2 (en) * | 1982-05-17 | 1991-06-27 | ||
| US6876180B2 (en) | 2001-11-12 | 2005-04-05 | Denso Corporation | Power supply circuit having a start up circuit |
| JP2008204695A (en) * | 2007-02-19 | 2008-09-04 | Matsushita Electric Works Ltd | Illumination device |
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