JPS57113603A - Nonlinear characteristic compensation circuit for amplifier - Google Patents
Nonlinear characteristic compensation circuit for amplifierInfo
- Publication number
- JPS57113603A JPS57113603A JP18749780A JP18749780A JPS57113603A JP S57113603 A JPS57113603 A JP S57113603A JP 18749780 A JP18749780 A JP 18749780A JP 18749780 A JP18749780 A JP 18749780A JP S57113603 A JPS57113603 A JP S57113603A
- Authority
- JP
- Japan
- Prior art keywords
- output
- phase
- phase shifter
- detector
- circuit
- 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 compensate the nonlinear characteristics due to secular change, by picking up a part of an input/output signal, commonly using a phase detector or an envelope detector or the both, and feeding back the detected output to a precircuit.
CONSTITUTION: A part of an input signal of a directional coupler DCP1 is fetched, and the output of a directional coupler DCP2 is coupled at a 3 dB hydrid circuit HYB via an attenuator ATT and a phase shifter PS1. The circuit HYB forms a phase detector PD, and the rectified output is DC-amplified DCA and applied to a phase shifter PS2 forming a pre-circuit. The output of the phase shifter PS2 is applied to a main amplifier MA via the hybrid circuit HYB. Thus, in a microwave band, a phase shifter with very less secular change can be achieved. Further, the distortion in amplitude itself or amplitude and phase can be corrected by using an envelope detection in place of the phase detector, or using the both.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18749780A JPS57113603A (en) | 1980-12-30 | 1980-12-30 | Nonlinear characteristic compensation circuit for amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18749780A JPS57113603A (en) | 1980-12-30 | 1980-12-30 | Nonlinear characteristic compensation circuit for amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57113603A true JPS57113603A (en) | 1982-07-15 |
Family
ID=16207091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18749780A Pending JPS57113603A (en) | 1980-12-30 | 1980-12-30 | Nonlinear characteristic compensation circuit for amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57113603A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4588958A (en) * | 1985-03-29 | 1986-05-13 | Rca Corporation | Adjustable reflective predistortion circuit |
JPS6278902A (en) * | 1985-10-01 | 1987-04-11 | Nec Corp | High output amplifier with linearized circuit |
JPH03198407A (en) * | 1989-12-26 | 1991-08-29 | Mitsubishi Electric Corp | Linear amplifier |
JPH03198512A (en) * | 1989-12-27 | 1991-08-29 | Mitsubishi Electric Corp | High frequency amplifier |
WO1997028598A1 (en) * | 1996-01-30 | 1997-08-07 | Spectrian | Linearity enhancing circuit for power amplifier |
WO2006059372A1 (en) | 2004-11-30 | 2006-06-08 | Fujitsu Limited | Signal take-out circuit and distortion compensation amplifier comprising it |
-
1980
- 1980-12-30 JP JP18749780A patent/JPS57113603A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4588958A (en) * | 1985-03-29 | 1986-05-13 | Rca Corporation | Adjustable reflective predistortion circuit |
JPS6278902A (en) * | 1985-10-01 | 1987-04-11 | Nec Corp | High output amplifier with linearized circuit |
JPH03198407A (en) * | 1989-12-26 | 1991-08-29 | Mitsubishi Electric Corp | Linear amplifier |
US5101172A (en) * | 1989-12-26 | 1992-03-31 | Mitsubishi Denki Kabushiki Kaisha | Linear amplifier |
JPH03198512A (en) * | 1989-12-27 | 1991-08-29 | Mitsubishi Electric Corp | High frequency amplifier |
WO1997028598A1 (en) * | 1996-01-30 | 1997-08-07 | Spectrian | Linearity enhancing circuit for power amplifier |
US5742201A (en) * | 1996-01-30 | 1998-04-21 | Spectrian | Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier |
USRE37407E1 (en) * | 1996-01-30 | 2001-10-16 | Spectrian Corporation | Polar envelope correction mechanism for enhancing linearity of RF/microwave power amplifier |
WO2006059372A1 (en) | 2004-11-30 | 2006-06-08 | Fujitsu Limited | Signal take-out circuit and distortion compensation amplifier comprising it |
US7456688B2 (en) | 2004-11-30 | 2008-11-25 | Fujitsu Limited | Signal extraction circuit and distortion-compensated amplifier incorporating the same |
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