JPS57155834A - Digital-to-analog converting circuit - Google Patents

Digital-to-analog converting circuit

Info

Publication number
JPS57155834A
JPS57155834A JP56040495A JP4049581A JPS57155834A JP S57155834 A JPS57155834 A JP S57155834A JP 56040495 A JP56040495 A JP 56040495A JP 4049581 A JP4049581 A JP 4049581A JP S57155834 A JPS57155834 A JP S57155834A
Authority
JP
Japan
Prior art keywords
comparison circuit
order
bit
digital
digital value
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
JP56040495A
Other languages
Japanese (ja)
Other versions
JPS6352808B2 (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 JP56040495A priority Critical patent/JPS57155834A/en
Priority to DE8282301357T priority patent/DE3271734D1/en
Priority to EP82301357A priority patent/EP0061292B1/en
Publication of JPS57155834A publication Critical patent/JPS57155834A/en
Priority to US06/624,747 priority patent/US4532496A/en
Publication of JPS6352808B2 publication Critical patent/JPS6352808B2/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

Abstract

PURPOSE:To simplify the constitution of a smoothing circuit, by generating a digital value train with scattering within a converting period sequentially and comparing this digital value train with an input digital value. CONSTITUTION:Lower-order 6-bit Q0-Q5 of a counter 1 counting clocks CK are applied to an upper 6-bit of a comparison circuit 2 in this order and an upper- order 4-bit is applied to the lower-order bits of the comparison circuit 2 in the opposite order. An input digital data DD is applied to the comparison circuit 2 via a latch 3. When both the digital values are coincident, the comparison circuit 2 inverts the output, the content of the counter 1 is scattered and applied to the comparison circuit 2, then the output of the comparison circuit 2 becomes 16 sets of PWM wave output in one converting period, allowing to simplify a smoothing circuit.
JP56040495A 1981-03-23 1981-03-23 Digital-to-analog converting circuit Granted JPS57155834A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56040495A JPS57155834A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit
DE8282301357T DE3271734D1 (en) 1981-03-23 1982-03-17 DA CONVERTER
EP82301357A EP0061292B1 (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
JP56040495A JPS57155834A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit

Publications (2)

Publication Number Publication Date
JPS57155834A true JPS57155834A (en) 1982-09-27
JPS6352808B2 JPS6352808B2 (en) 1988-10-20

Family

ID=12582147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56040495A Granted JPS57155834A (en) 1981-03-23 1981-03-23 Digital-to-analog converting circuit

Country Status (1)

Country Link
JP (1) JPS57155834A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61289719A (en) * 1985-06-18 1986-12-19 Meidensha Electric Mfg Co Ltd Pulse width modulation circuit
JPS62250885A (en) * 1986-04-24 1987-10-31 Canon Inc Controller for motor
JPH0461937U (en) * 1990-10-05 1992-05-27
JPH06311040A (en) * 1993-04-26 1994-11-04 Jeco Co Ltd Pulse width modulation circuit

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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61289719A (en) * 1985-06-18 1986-12-19 Meidensha Electric Mfg Co Ltd Pulse width modulation circuit
JPH0652863B2 (en) * 1985-06-18 1994-07-06 株式会社明電舍 Pulse width modulation circuit
JPS62250885A (en) * 1986-04-24 1987-10-31 Canon Inc Controller for motor
JPH0461937U (en) * 1990-10-05 1992-05-27
JPH06311040A (en) * 1993-04-26 1994-11-04 Jeco Co Ltd Pulse width modulation circuit

Also Published As

Publication number Publication date
JPS6352808B2 (en) 1988-10-20

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