JPS57129008A - Power amplifier - Google Patents
Power amplifierInfo
- Publication number
- JPS57129008A JPS57129008A JP56014307A JP1430781A JPS57129008A JP S57129008 A JPS57129008 A JP S57129008A JP 56014307 A JP56014307 A JP 56014307A JP 1430781 A JP1430781 A JP 1430781A JP S57129008 A JPS57129008 A JP S57129008A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- circuit
- electric power
- power amplifier
- power supply
- 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
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To simplify a circuit and to reduce a cost as an electric power amplifier, by using both a capacitor for automatic release in a safety operation area protecting circuit, and a capacitor for removing an electric power supply ripple.
CONSTITUTION: Both output transistors (TR) Q19, Q21 are cascaded and the B- class push-pull operation is executed. On the base of a TR Q23, a constant- current TR Q9 for supplying a bias current is provided. A capacitor C101 for removing an electric power supply ripple component of a bias current circuit is connected to the connecting point of resistances R9, R10 through the 8-th terminal. Accordingly, in case when the TR Q19 has been deviated from the prescribbed operation area, the TR Q19 is cut off forcibly by the bias controlling circuit, and the operation of the TR Q19 is released by a time constant which has utilized the capacitor C101.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56014307A JPS57129008A (en) | 1981-02-04 | 1981-02-04 | Power amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56014307A JPS57129008A (en) | 1981-02-04 | 1981-02-04 | Power amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57129008A true JPS57129008A (en) | 1982-08-10 |
JPH0119286B2 JPH0119286B2 (en) | 1989-04-11 |
Family
ID=11857438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56014307A Granted JPS57129008A (en) | 1981-02-04 | 1981-02-04 | Power amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57129008A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4835251U (en) * | 1971-09-01 | 1973-04-27 | ||
JPS4855748U (en) * | 1971-10-27 | 1973-07-17 |
-
1981
- 1981-02-04 JP JP56014307A patent/JPS57129008A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4835251U (en) * | 1971-09-01 | 1973-04-27 | ||
JPS4855748U (en) * | 1971-10-27 | 1973-07-17 |
Also Published As
Publication number | Publication date |
---|---|
JPH0119286B2 (en) | 1989-04-11 |
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