JPS56122233A - Pcm-pwm system amplifier - Google Patents
Pcm-pwm system amplifierInfo
- Publication number
- JPS56122233A JPS56122233A JP2493480A JP2493480A JPS56122233A JP S56122233 A JPS56122233 A JP S56122233A JP 2493480 A JP2493480 A JP 2493480A JP 2493480 A JP2493480 A JP 2493480A JP S56122233 A JPS56122233 A JP S56122233A
- Authority
- JP
- Japan
- Prior art keywords
- pcm
- signal
- pwm
- distortion
- converter
- 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
- Signal Processing For Digital Recording And Reproducing (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To improve the distortion of a PCM-PWM converter, by incorporating a circuit that detects the distortion of a PCM-PWM converter and a circuit that compensates the distortion component into a PCM-PWM system amplifier.
CONSTITUTION: The PCM signal A is converted into the PWM signal B through the PCM-PWM converter 2. If a distortion is caused in the conversion, the PCM code row of the PCM signal C obtained from the A-D converter 4 becomes different from the PCM signal A. Thus the error signal D obtained from the comparator 5 is obtained as an error code corresponding to the PCM signal C. The error code is applied as a high-level pulse when the signal C is smaller than the signal A. Then the adder/subtractor 6 performs an addition to obtain the corrected PCM signal E. As a result, the PWM signal delivered from the PCM-PWM converter 9 has a correct pulse duration.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2493480A JPS56122233A (en) | 1980-02-28 | 1980-02-28 | Pcm-pwm system amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2493480A JPS56122233A (en) | 1980-02-28 | 1980-02-28 | Pcm-pwm system amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56122233A true JPS56122233A (en) | 1981-09-25 |
Family
ID=12151904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2493480A Pending JPS56122233A (en) | 1980-02-28 | 1980-02-28 | Pcm-pwm system amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56122233A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02184117A (en) * | 1988-12-02 | 1990-07-18 | Tabai Espec Corp | Analog voltage generating circuit |
JP2003264465A (en) * | 2002-03-07 | 2003-09-19 | Nippon Precision Circuits Inc | Pulse width modulation device and da converter |
US11107652B2 (en) | 2017-08-03 | 2021-08-31 | Nuventura Gmbh | Circuit breaker for gas insulated switchgear |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4948258A (en) * | 1972-07-21 | 1974-05-10 | ||
JPS5122789A (en) * | 1974-08-19 | 1976-02-23 | Asahi Chemical Ind | NETSUKASOSEISOSEIBUTSU |
JPS53124053A (en) * | 1977-04-06 | 1978-10-30 | Hitachi Ltd | D/a converter with correction circuit |
-
1980
- 1980-02-28 JP JP2493480A patent/JPS56122233A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4948258A (en) * | 1972-07-21 | 1974-05-10 | ||
JPS5122789A (en) * | 1974-08-19 | 1976-02-23 | Asahi Chemical Ind | NETSUKASOSEISOSEIBUTSU |
JPS53124053A (en) * | 1977-04-06 | 1978-10-30 | Hitachi Ltd | D/a converter with correction circuit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02184117A (en) * | 1988-12-02 | 1990-07-18 | Tabai Espec Corp | Analog voltage generating circuit |
JP2003264465A (en) * | 2002-03-07 | 2003-09-19 | Nippon Precision Circuits Inc | Pulse width modulation device and da converter |
US11107652B2 (en) | 2017-08-03 | 2021-08-31 | Nuventura Gmbh | Circuit breaker for gas insulated switchgear |
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