JPS56162510A - Amplifier - Google Patents
AmplifierInfo
- Publication number
- JPS56162510A JPS56162510A JP6662580A JP6662580A JPS56162510A JP S56162510 A JPS56162510 A JP S56162510A JP 6662580 A JP6662580 A JP 6662580A JP 6662580 A JP6662580 A JP 6662580A JP S56162510 A JPS56162510 A JP S56162510A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- amplifier
- turns
- muting
- potential
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To eliminate a shock sound in switching and to nearly eliminate power consumption when an amplifier with a function of muting used for a microcassette tape recorder, etc., is off, by turning on and off the amplifier by holding one point of a current source biasing circuit at an open potential and earth potential. CONSTITUTION:The output of a time constant circuit set by a resistance (R) 1 provided between a power terminal 18 and an earth terminal 20 and a capacitor (C) 1 connected to a terminal 16 is supplied to a transistor (TR) Q3. To the TRQ3, a current Miller circuit composed of TRs Q4 and Q5 is connected and in the current Miller circuit, a muting part 14 is constituted by connecting TRs Q6 and Q7 in series. A voltage at a point (a) obtained by the muting part 16 is applied as a current source bias to an amplification part 15. When the terminal 16 is grounded, the TRQ3 turns off and the amplifier 15 also turns off. When the terminal is opened, the potential at the terminal 16 rises with a time constant determined by the R1 and C1 and the amplifier 15 turns on. Therefore, no shock sound in switching is generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6662580A JPS56162510A (en) | 1980-05-20 | 1980-05-20 | Amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6662580A JPS56162510A (en) | 1980-05-20 | 1980-05-20 | Amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56162510A true JPS56162510A (en) | 1981-12-14 |
| JPH0135532B2 JPH0135532B2 (en) | 1989-07-26 |
Family
ID=13321251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6662580A Granted JPS56162510A (en) | 1980-05-20 | 1980-05-20 | Amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56162510A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58107609U (en) * | 1982-01-16 | 1983-07-22 | 日本コロムビア株式会社 | Amplifier muting circuit |
| JPS58191708U (en) * | 1982-06-16 | 1983-12-20 | パイオニア株式会社 | Muting amplifier malfunction prevention circuit |
| JPS6091701A (en) * | 1983-10-25 | 1985-05-23 | Rohm Co Ltd | Amplifier circuit |
| JPH02126415U (en) * | 1989-03-24 | 1990-10-18 |
-
1980
- 1980-05-20 JP JP6662580A patent/JPS56162510A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58107609U (en) * | 1982-01-16 | 1983-07-22 | 日本コロムビア株式会社 | Amplifier muting circuit |
| JPS58191708U (en) * | 1982-06-16 | 1983-12-20 | パイオニア株式会社 | Muting amplifier malfunction prevention circuit |
| JPH0115227Y2 (en) * | 1982-06-16 | 1989-05-08 | ||
| JPS6091701A (en) * | 1983-10-25 | 1985-05-23 | Rohm Co Ltd | Amplifier circuit |
| JPH02126415U (en) * | 1989-03-24 | 1990-10-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0135532B2 (en) | 1989-07-26 |
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