JPS56122233A - Pcm-pwm system amplifier - Google Patents

Pcm-pwm system amplifier

Info

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
Application number
JP2493480A
Other languages
Japanese (ja)
Inventor
Akihiro Oshita
Keizo Okuno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2493480A priority Critical patent/JPS56122233A/en
Publication of JPS56122233A publication Critical patent/JPS56122233A/en
Pending legal-status Critical Current

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
JP2493480A 1980-02-28 1980-02-28 Pcm-pwm system amplifier Pending JPS56122233A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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