JPS6449438A - Circuit for compensating non-linear distortion - Google Patents
Circuit for compensating non-linear distortionInfo
- Publication number
- JPS6449438A JPS6449438A JP20693487A JP20693487A JPS6449438A JP S6449438 A JPS6449438 A JP S6449438A JP 20693487 A JP20693487 A JP 20693487A JP 20693487 A JP20693487 A JP 20693487A JP S6449438 A JPS6449438 A JP S6449438A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- comparator
- ambient temperature
- distortion
- sensor
- 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
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To perform distortion correction corresponding correctly to the change of an ambient temperature, by providing a temperature sensor and a comparator in the neighborhood of a power amplifier that is a heat generating source, and selecting the content of a ROM in a pre-distortion attaching circuit by the output of the comparator. CONSTITUTION:An ambient temperature signal generation means 4 is constituted of the temperature sensor 41 and the comparator 42, and the sensor 41 is arranged in the neighborhood of the power amplifier 32 that is the heat generating source, and detects the ambient temperature and inputs the output S to the comparator 42. The comparator 42 inputs the output S of the sensor 41, and compares it with a reference temperature value R, and outputs a detection signal C. The signal C is inputted to the pre-distortion attaching circuit 1, and performs appropriate compensation on the signals I-ch and Q-ch of two group transmission signal input that are the input of the circuit 1 by switching correction data classified by every ambient temperature in ROMs 11 and 12 in the circuit 1. Therefore, the circuit 1 always corrects non-linear distortion generated by a modulator 2 or a frequency conversion/power amplifier 3 correctly and outputs the signal without the non-linear distortion by the amplifier 32 even when the ambient temperature changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20693487A JPS6449438A (en) | 1987-08-20 | 1987-08-20 | Circuit for compensating non-linear distortion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20693487A JPS6449438A (en) | 1987-08-20 | 1987-08-20 | Circuit for compensating non-linear distortion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6449438A true JPS6449438A (en) | 1989-02-23 |
Family
ID=16531461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20693487A Pending JPS6449438A (en) | 1987-08-20 | 1987-08-20 | Circuit for compensating non-linear distortion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6449438A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03139904A (en) * | 1989-10-25 | 1991-06-14 | Nec Corp | Envelope detecting amplifier system with temperature compensation |
| JPH0390508U (en) * | 1989-12-29 | 1991-09-13 | ||
| JPH0865352A (en) * | 1994-08-24 | 1996-03-08 | Yuseisho Tsushin Sogo Kenkyusho | Digital modulator |
| JP2008005129A (en) * | 2006-06-21 | 2008-01-10 | Nec Corp | Nonlinear distortion compensating circuit, transmission device, nonlinear distortion compensating method, program, and recording medium |
| JP2008040530A (en) * | 2006-08-01 | 2008-02-21 | Omron Corp | Control device and temperature controller |
-
1987
- 1987-08-20 JP JP20693487A patent/JPS6449438A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03139904A (en) * | 1989-10-25 | 1991-06-14 | Nec Corp | Envelope detecting amplifier system with temperature compensation |
| JPH0390508U (en) * | 1989-12-29 | 1991-09-13 | ||
| JPH0865352A (en) * | 1994-08-24 | 1996-03-08 | Yuseisho Tsushin Sogo Kenkyusho | Digital modulator |
| JP2008005129A (en) * | 2006-06-21 | 2008-01-10 | Nec Corp | Nonlinear distortion compensating circuit, transmission device, nonlinear distortion compensating method, program, and recording medium |
| JP2008040530A (en) * | 2006-08-01 | 2008-02-21 | Omron Corp | Control device and temperature controller |
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