JPS57155833A - Digital-to-analog converting circuit - Google Patents

Digital-to-analog converting circuit

Info

Publication number
JPS57155833A
JPS57155833A JP56040494A JP4049481A JPS57155833A JP S57155833 A JPS57155833 A JP S57155833A JP 56040494 A JP56040494 A JP 56040494A JP 4049481 A JP4049481 A JP 4049481A JP S57155833 A JPS57155833 A JP S57155833A
Authority
JP
Japan
Prior art keywords
bit
order
circuit
output
digital data
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
Application number
JP56040494A
Other languages
Japanese (ja)
Other versions
JPS6359570B2 (en
Inventor
Taaki Ichise
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56040494A priority Critical patent/JPS57155833A/en
Priority to EP82301357A priority patent/EP0061292B1/en
Priority to DE8282301357T priority patent/DE3271734D1/en
Publication of JPS57155833A publication Critical patent/JPS57155833A/en
Priority to US06/624,747 priority patent/US4532496A/en
Publication of JPS6359570B2 publication Critical patent/JPS6359570B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/68—Digital/analogue converters with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and another conversion to the less significant bits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/82—Digital/analogue converters with intermediate conversion to time interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To simplify the constitution of a smoothing circuit, by generating digital value trains with scattering within a converting period, comparing the digital value trains and input digital data at two comparators and taking logic for the two compared outputs. CONSTITUTION:A lower-order 6-bit of a counter 1 counting clocks CK is applied to a coincidence circuit 3 and compares with an upper-order 6-bit of an input digital data DD. The order of the upper-order 4-bit of the counter 1 is inversed and the bit is applied to the comparison circuit 2 and compares with the lower- order 4-bit of the input digital data DD. A delay control circuit 4 paasses through the output of the coincidence circuit 3 as it is, when the output of the comparison circuit 2 is at ''1'' and delays the output of the coincidence circuit 3 by one clock period when ''0''. Since the output of a flip-flop 5 becomes 16 sets of PWM wave in one converting period, the configuration of the smoothing circuit is made simple.
JP56040494A 1981-03-23 1981-03-23 Digital-to-analog converting circuit Granted JPS57155833A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56040494A JPS57155833A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit
EP82301357A EP0061292B1 (en) 1981-03-23 1982-03-17 Da converter
DE8282301357T DE3271734D1 (en) 1981-03-23 1982-03-17 DA CONVERTER
US06/624,747 US4532496A (en) 1981-03-23 1984-06-26 Pulse width modulation type digital to analog converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56040494A JPS57155833A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit

Publications (2)

Publication Number Publication Date
JPS57155833A true JPS57155833A (en) 1982-09-27
JPS6359570B2 JPS6359570B2 (en) 1988-11-21

Family

ID=12582119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56040494A Granted JPS57155833A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit

Country Status (1)

Country Link
JP (1) JPS57155833A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5977721A (en) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd Pulse width modulator
JPS6242620A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Pwm type d/a converting circuit
JPS6436118A (en) * 1987-07-31 1989-02-07 Mazda Motor Digital pulse width modulator
JPS6437124A (en) * 1987-08-03 1989-02-07 Hitachi Ltd Pulse width modulating signal generator
JPH01233910A (en) * 1988-03-15 1989-09-19 Rohm Co Ltd Pwm circuit
JPH03207124A (en) * 1989-10-06 1991-09-10 Endress & Hauser Gmbh & Co Convergion device of electric input signal to electric dc signal proportional to electric input signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51123501A (en) * 1975-04-08 1976-10-28 Philips Nv Signal converter
JPS5539499A (en) * 1978-09-06 1980-03-19 Siemens Ag Method of and device for converting digital to analog

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51123501A (en) * 1975-04-08 1976-10-28 Philips Nv Signal converter
JPS5539499A (en) * 1978-09-06 1980-03-19 Siemens Ag Method of and device for converting digital to analog

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5977721A (en) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd Pulse width modulator
JPH0123967B2 (en) * 1982-10-26 1989-05-09 Matsushita Electric Ind Co Ltd
JPS6242620A (en) * 1985-08-20 1987-02-24 Sanyo Electric Co Ltd Pwm type d/a converting circuit
JPS6436118A (en) * 1987-07-31 1989-02-07 Mazda Motor Digital pulse width modulator
JPS6437124A (en) * 1987-08-03 1989-02-07 Hitachi Ltd Pulse width modulating signal generator
JPH01233910A (en) * 1988-03-15 1989-09-19 Rohm Co Ltd Pwm circuit
JPH03207124A (en) * 1989-10-06 1991-09-10 Endress & Hauser Gmbh & Co Convergion device of electric input signal to electric dc signal proportional to electric input signal

Also Published As

Publication number Publication date
JPS6359570B2 (en) 1988-11-21

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