JPS57212811A - Power amplifier - Google Patents
Power amplifierInfo
- Publication number
- JPS57212811A JPS57212811A JP56097700A JP9770081A JPS57212811A JP S57212811 A JPS57212811 A JP S57212811A JP 56097700 A JP56097700 A JP 56097700A JP 9770081 A JP9770081 A JP 9770081A JP S57212811 A JPS57212811 A JP S57212811A
- Authority
- JP
- Japan
- Prior art keywords
- value
- input signal
- signal voltage
- exceeds
- switching element
- 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 decrease the loss of a switching element itself, by changing an output voltage of a smoothing circuit in response to an input signal voltage and compulsively increasing the power supply voltage of an output amplifying element when the differentiation value of the input signal voltage exceeds a prescribed value.
CONSTITUTION: The 1st control circuit 23 compares an input signal voltage applied to an input terminal 11 with a feedback voltage proportional to an output voltage of a smoothing circuit 18 fed back via feedback resistors 21 and 22, and when the absolute value of the difference of the both exceeds a prescribed value, the 1st switching element 13 is conducted. The 2nd control circuit 24 conducts the 2nd switching element 14 for a prescribed time when the differentiation value of the input signal voltage applied to the input terminal 11 exceeds a specified value.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56097700A JPS57212811A (en) | 1981-06-24 | 1981-06-24 | Power amplifier |
US06/331,273 US4472687A (en) | 1980-12-24 | 1981-12-16 | Audio power amplifier for supplying electric power to a load by switching of power supply voltage |
EP81110608A EP0054943B2 (en) | 1980-12-24 | 1981-12-18 | Power amplifier for supplying electric power to a load by switching of power supply voltage |
DE8181110608T DE3171279D1 (en) | 1980-12-24 | 1981-12-18 | Power amplifier for supplying electric power to a load by switching of power supply voltage |
CA000393088A CA1181139A (en) | 1980-12-24 | 1981-12-23 | Power amplifier for supplying electric power to a load by switching of power supply voltage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56097700A JPS57212811A (en) | 1981-06-24 | 1981-06-24 | Power amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57212811A true JPS57212811A (en) | 1982-12-27 |
Family
ID=14199198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56097700A Pending JPS57212811A (en) | 1980-12-24 | 1981-06-24 | Power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57212811A (en) |
-
1981
- 1981-06-24 JP JP56097700A patent/JPS57212811A/en active Pending
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