JPS5523682A - Power amplifier - Google Patents
Power amplifierInfo
- Publication number
- JPS5523682A JPS5523682A JP9707578A JP9707578A JPS5523682A JP S5523682 A JPS5523682 A JP S5523682A JP 9707578 A JP9707578 A JP 9707578A JP 9707578 A JP9707578 A JP 9707578A JP S5523682 A JPS5523682 A JP S5523682A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- output
- circuit
- 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
Abstract
PURPOSE: To avoid the speaker from being outputted with pulsative excess current, by increasing the voltage at the output terminal gradually, through the gradual increase of the collector potential of drive transistor driving the push pull circuit at the application of power supply.
CONSTITUTION: The amplifier provides the SEPP power amplifying circuit consisting of complementary transistors Tr 21 and 22, and drive circuit consisting of Tr 18 driving the circuit and diode 20, and the voltage from the power supply 7 is fed to Tr 18 via Tr 12, 15 constituting the differential amplifier to drive the power amplifying circuit. Between the power supply 7 and Tr 18 with this constitution, the line voltage fulctuation rejection circuit consisting of Tr 23, resistor 24 and capacitor 1, is connected. At the voltage transient of power application, the switch means 27 is closed, and a voltage is fed to the collector of Tr 18 via through Tr 26, and at steady state, the means 27 is opened. The output of Tr 18 at the period when the transient variation is caused at the application of power supply, is taken as the output voltage of the power amplifying circuit the same, to avoid the output of excess current to the load 5.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9707578A JPS5523682A (en) | 1978-08-08 | 1978-08-08 | Power amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9707578A JPS5523682A (en) | 1978-08-08 | 1978-08-08 | Power amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5523682A true JPS5523682A (en) | 1980-02-20 |
JPS6153889B2 JPS6153889B2 (en) | 1986-11-19 |
Family
ID=14182512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9707578A Granted JPS5523682A (en) | 1978-08-08 | 1978-08-08 | Power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5523682A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0376391U (en) * | 1989-11-28 | 1991-07-31 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS498153A (en) * | 1972-05-10 | 1974-01-24 |
-
1978
- 1978-08-08 JP JP9707578A patent/JPS5523682A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS498153A (en) * | 1972-05-10 | 1974-01-24 |
Also Published As
Publication number | Publication date |
---|---|
JPS6153889B2 (en) | 1986-11-19 |
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