JPS55124327A - Digital-analog converting circuit - Google Patents

Digital-analog converting circuit

Info

Publication number
JPS55124327A
JPS55124327A JP3111079A JP3111079A JPS55124327A JP S55124327 A JPS55124327 A JP S55124327A JP 3111079 A JP3111079 A JP 3111079A JP 3111079 A JP3111079 A JP 3111079A JP S55124327 A JPS55124327 A JP S55124327A
Authority
JP
Japan
Prior art keywords
counter
signal
output
digital
circuits
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
JP3111079A
Other languages
Japanese (ja)
Inventor
Yasuo Kaminaga
Shigeru Matsuo
Tetsuo Suehiro
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3111079A priority Critical patent/JPS55124327A/en
Publication of JPS55124327A publication Critical patent/JPS55124327A/en
Pending 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
    • H03M1/82—Digital/analogue converters with intermediate conversion to time interval

Abstract

PURPOSE:To secure the sufficient accuracy as well as facilitate an easy LSI formation of the circuit by decreasing the number of the analog circuits which give the direct effect to the output accuracy and then constituting most of the circuits with the digital circuits, thus realizing the miniaturization of the converting circuit. CONSTITUTION:The pulse row signal (1) of the fixed frequency is generated from oscillator 1, and signal (1) is divided into the fixed ratio through divider counter 2. This divided signal (2) is applied to RSFF4 as well as to preset counter 3 to which digital input IN to be converted is applied. At the same time, the output of gate 5 which gives gating to the output of signal (1) and FF4 is applied to counter 3. Then input IN of counter 3 is set in synchronization with the output of counter 2, and the time during which the set digital quantity is turned to zero via signal (1) is counted by counter 3, and then the ratio the counted time and the cycle of counter 2 is applied to buffer gate 6 via FF4. Then the signal converted into the analog quantity is delivered via filter 7.
JP3111079A 1979-03-19 1979-03-19 Digital-analog converting circuit Pending JPS55124327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3111079A JPS55124327A (en) 1979-03-19 1979-03-19 Digital-analog converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3111079A JPS55124327A (en) 1979-03-19 1979-03-19 Digital-analog converting circuit

Publications (1)

Publication Number Publication Date
JPS55124327A true JPS55124327A (en) 1980-09-25

Family

ID=12322255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3111079A Pending JPS55124327A (en) 1979-03-19 1979-03-19 Digital-analog converting circuit

Country Status (1)

Country Link
JP (1) JPS55124327A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188131A (en) * 1981-05-15 1982-11-19 Matsushita Electric Ind Co Ltd Pulse width modulation circuit
JPS5830227A (en) * 1981-08-18 1983-02-22 Matsushita Electric Ind Co Ltd Pulse width modulating circuit
JPS58168327A (en) * 1982-03-29 1983-10-04 Toshiba Corp Pulse width modulating circuit
JPS6158325A (en) * 1984-08-29 1986-03-25 Shimadzu Corp D/a converter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188131A (en) * 1981-05-15 1982-11-19 Matsushita Electric Ind Co Ltd Pulse width modulation circuit
JPS6258572B2 (en) * 1981-05-15 1987-12-07 Matsushita Electric Ind Co Ltd
JPS5830227A (en) * 1981-08-18 1983-02-22 Matsushita Electric Ind Co Ltd Pulse width modulating circuit
JPS58168327A (en) * 1982-03-29 1983-10-04 Toshiba Corp Pulse width modulating circuit
JPS6158325A (en) * 1984-08-29 1986-03-25 Shimadzu Corp D/a converter

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