JPS57185709A - Compensation circuit for operating point for transistor linear amplifier - Google Patents
Compensation circuit for operating point for transistor linear amplifierInfo
- Publication number
- JPS57185709A JPS57185709A JP56070998A JP7099881A JPS57185709A JP S57185709 A JPS57185709 A JP S57185709A JP 56070998 A JP56070998 A JP 56070998A JP 7099881 A JP7099881 A JP 7099881A JP S57185709 A JPS57185709 A JP S57185709A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- transistor
- output
- base bias
- operating point
- 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
- Amplifiers (AREA)
Abstract
PURPOSE: To improve the intermodulation distortion and the linearity of input and output, by compensating the fluctuation of the operating point of amplifier due to the change in a junction temperature, through the detection of an output of a transistor linear amplifier and the application of compensation to a base bias power supply.
CONSTITUTION: An output voltage V0 of a transistor type class AB linear amplifier 1 is inputted to a compensation voltage detecting circuit 2 with a transistor inner loss, and the envelope of an output is obtained with the linear detection and a base bias voltage VOC to be compensated with the correction of the coefficient and the second order approximation is obtained. Further, the base bias voltage is inputted to a time constant circuit 3 to obtain a correction voltage V'OC in response to the fluctuation of inner loss of a transistor. On the other hand, a forward voltage VD in response to the temperature of a heat sink is obtained from a temperature sensor diode 4 and a base bias compensation voltage VBC is obtained by adding the voltage VD to the V'OC. This voltage is subtracted from a bias constant voltage VBS to obtain a base bias application voltage VBE, which is applied to the base of transistor, and the operating point of the transistor can be compensated.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56070998A JPS57185709A (en) | 1981-05-12 | 1981-05-12 | Compensation circuit for operating point for transistor linear amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56070998A JPS57185709A (en) | 1981-05-12 | 1981-05-12 | Compensation circuit for operating point for transistor linear amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57185709A true JPS57185709A (en) | 1982-11-16 |
JPH033962B2 JPH033962B2 (en) | 1991-01-21 |
Family
ID=13447731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56070998A Granted JPS57185709A (en) | 1981-05-12 | 1981-05-12 | Compensation circuit for operating point for transistor linear amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57185709A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5910008A (en) * | 1982-07-08 | 1984-01-19 | Matsushita Electric Ind Co Ltd | Power amplifier |
JPS60116719U (en) * | 1984-01-17 | 1985-08-07 | 株式会社東芝 | Field effect transistor amplifier circuit |
JPS60127022U (en) * | 1984-02-06 | 1985-08-27 | 横河・ヒユ−レツト・パツカ−ド株式会社 | signal output device |
JPS60158314U (en) * | 1984-03-27 | 1985-10-22 | タケダ理研工業株式会社 | High precision operational amplifier circuit |
JPS6162421U (en) * | 1984-09-29 | 1986-04-26 | ||
EP0708523A3 (en) * | 1994-10-21 | 1997-08-20 | Hewlett Packard Co | Method and apparatus for compensating thermal time constants in an electronic amplifier |
KR100247154B1 (en) * | 1997-06-13 | 2000-03-15 | 윤종용 | Circuit for output level control of power amp. |
-
1981
- 1981-05-12 JP JP56070998A patent/JPS57185709A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5910008A (en) * | 1982-07-08 | 1984-01-19 | Matsushita Electric Ind Co Ltd | Power amplifier |
JPS60116719U (en) * | 1984-01-17 | 1985-08-07 | 株式会社東芝 | Field effect transistor amplifier circuit |
JPS60127022U (en) * | 1984-02-06 | 1985-08-27 | 横河・ヒユ−レツト・パツカ−ド株式会社 | signal output device |
JPS60158314U (en) * | 1984-03-27 | 1985-10-22 | タケダ理研工業株式会社 | High precision operational amplifier circuit |
JPS6162421U (en) * | 1984-09-29 | 1986-04-26 | ||
EP0708523A3 (en) * | 1994-10-21 | 1997-08-20 | Hewlett Packard Co | Method and apparatus for compensating thermal time constants in an electronic amplifier |
KR100247154B1 (en) * | 1997-06-13 | 2000-03-15 | 윤종용 | Circuit for output level control of power amp. |
Also Published As
Publication number | Publication date |
---|---|
JPH033962B2 (en) | 1991-01-21 |
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