JPS5715506A - Power supply circuit for class a power amplifier - Google Patents
Power supply circuit for class a power amplifierInfo
- Publication number
- JPS5715506A JPS5715506A JP9103280A JP9103280A JPS5715506A JP S5715506 A JPS5715506 A JP S5715506A JP 9103280 A JP9103280 A JP 9103280A JP 9103280 A JP9103280 A JP 9103280A JP S5715506 A JPS5715506 A JP S5715506A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- signal
- class
- voltage
- power
- 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
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To reduce the collector loss of an output transistor and to increase the efficiency of a power amplifier, by controlling the supply of a power supply voltage according to the signal level of an input signal.
CONSTITUTION: A class A power amplifier 2 consists of output power transistors (TR)Q7, Q9 which are complementary. A voltage source E0 outputting a very lower voltage than the voltage of power supplies +B, -B is connected between power supply electrodes (collector) A, B of the TRs Q7, Q9, and a class B amplifier 5 supplying an output voltage according to the signal level of positive component of an input signal VIN of the amplifier 2 to the electrode A and a class B amplifier 6 supplying the output voltage according to the signal level of a negative component of the signal VIN to the electrode B, are provided. Further, at noninput signal, an idle current is supplied from the voltage source E0, and when the signal level of the positive component of the signal VIN is increased, the amplifier 5 only is operated, the voltage of the electrode A is fluctuated according to this signal level, and the opposite operation is made at the signal input of the negative component.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9103280A JPS5715506A (en) | 1980-07-03 | 1980-07-03 | Power supply circuit for class a power amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9103280A JPS5715506A (en) | 1980-07-03 | 1980-07-03 | Power supply circuit for class a power amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5715506A true JPS5715506A (en) | 1982-01-26 |
JPH0147927B2 JPH0147927B2 (en) | 1989-10-17 |
Family
ID=14015165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9103280A Granted JPS5715506A (en) | 1980-07-03 | 1980-07-03 | Power supply circuit for class a power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5715506A (en) |
-
1980
- 1980-07-03 JP JP9103280A patent/JPS5715506A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0147927B2 (en) | 1989-10-17 |
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