JPS5795706A - Power supply circuit for power amplifier - Google Patents
Power supply circuit for power amplifierInfo
- Publication number
- JPS5795706A JPS5795706A JP55172411A JP17241180A JPS5795706A JP S5795706 A JPS5795706 A JP S5795706A JP 55172411 A JP55172411 A JP 55172411A JP 17241180 A JP17241180 A JP 17241180A JP S5795706 A JPS5795706 A JP S5795706A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power
- generated
- amplifier
- power amplifier
- 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
Abstract
PURPOSE: To reduce the loss of the power amplifying element of the power amplifier of the SEPP system and to improve the power utilizing rate, by generating a 2n-fold voltage of a prescribed voltage by the switching operation of an input signal and supplying this generated voltage to the power amplifying element.
CONSTITUTION: An input signal voltage Ei is inputted to a power amplifier 1 to drive a load Rl from the common connection point between emitters of power transistors (TR) Q1 and Q2 of the single end push-pull system. In a double voltage generating circuit 2, an output signal voltage E0 of the amplifier 1 is applied to the base common connection point of switching TRs Q3 and Q4 through a resistance R1, and a voltage V is generated through a diode D1 if the voltage E0 is lower than a prescribed threshold, and a voltage 2V is generated if the voltage E0 exceeds the threshold. A double voltage generating circuit 3 generates voltages -V and -2V similarly through a D2. Thus, voltages applied to collectors of TRs Q1 and Q2 are increased only when the output amplitude is large, thus reducing the collector loss and improving the power utilizing rate.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172411A JPS5795706A (en) | 1980-12-06 | 1980-12-06 | Power supply circuit for power amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172411A JPS5795706A (en) | 1980-12-06 | 1980-12-06 | Power supply circuit for power amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5795706A true JPS5795706A (en) | 1982-06-14 |
Family
ID=15941452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55172411A Pending JPS5795706A (en) | 1980-12-06 | 1980-12-06 | Power supply circuit for power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5795706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007150872A (en) * | 2005-11-29 | 2007-06-14 | Matsushita Electric Ind Co Ltd | Signal output circuit and communication apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS567504A (en) * | 1979-06-29 | 1981-01-26 | Matsushita Electric Ind Co Ltd | Amplifier |
-
1980
- 1980-12-06 JP JP55172411A patent/JPS5795706A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS567504A (en) * | 1979-06-29 | 1981-01-26 | Matsushita Electric Ind Co Ltd | Amplifier |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007150872A (en) * | 2005-11-29 | 2007-06-14 | Matsushita Electric Ind Co Ltd | Signal output circuit and communication apparatus |
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