JPS5640308A - Electric power supply unit of power amplifier - Google Patents
Electric power supply unit of power amplifierInfo
- Publication number
- JPS5640308A JPS5640308A JP11698779A JP11698779A JPS5640308A JP S5640308 A JPS5640308 A JP S5640308A JP 11698779 A JP11698779 A JP 11698779A JP 11698779 A JP11698779 A JP 11698779A JP S5640308 A JPS5640308 A JP S5640308A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- voltage
- power source
- case
- half cycle
- 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
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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0244—Stepped control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE:To perform high-efficiency electric power supply adapted to battery driving, by driving the amplifier by a low power source voltage for a small amplitude and by driving the amplifier by a high power source voltage only for a large amplitude. CONSTITUTION:In case of a small amplitude of output 3 of amplifier 2 and a positive half cycle, diode 22 becomes conductive by the difference between the potential of positive power source line 12 and the potential of output 3. Consequently, transistors 20 and 16 are turned on, and transistor 17 is turned off, and the half voltage of voltage E of battery 5 is supplied to amplifier 2, and a current is flowed to load 4 through capacitor 14. In case of a negative half cycle, a current is flowed through capacitor 15 similarly. Further, in case of a large output of amplifier 2 and a positive half cycle, transistors 20 and 17 are turned off and on respectively, and negative power source line 7 and common line 7 are short-circuited. Consequently, voltage E is applied between positive power lines 6 and 12 and common line 9. In case of a negative half cycle, voltage E is applied between negative power source lines 7 and 13 and common line 9 similarly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11698779A JPS5640308A (en) | 1979-09-12 | 1979-09-12 | Electric power supply unit of power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11698779A JPS5640308A (en) | 1979-09-12 | 1979-09-12 | Electric power supply unit of power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5640308A true JPS5640308A (en) | 1981-04-16 |
Family
ID=14700670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11698779A Pending JPS5640308A (en) | 1979-09-12 | 1979-09-12 | Electric power supply unit of power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5640308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093363A (en) * | 1983-10-27 | 1985-05-25 | Koden Electronics Co Ltd | Radio direction finding method |
| JPH0672072U (en) * | 1992-02-20 | 1994-10-07 | 株式会社光電製作所 | Wireless direction measuring device |
-
1979
- 1979-09-12 JP JP11698779A patent/JPS5640308A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093363A (en) * | 1983-10-27 | 1985-05-25 | Koden Electronics Co Ltd | Radio direction finding method |
| JPH0672072U (en) * | 1992-02-20 | 1994-10-07 | 株式会社光電製作所 | Wireless direction measuring device |
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