JPS57118437A - Analog-to-digital converter - Google Patents

Analog-to-digital converter

Info

Publication number
JPS57118437A
JPS57118437A JP386581A JP386581A JPS57118437A JP S57118437 A JPS57118437 A JP S57118437A JP 386581 A JP386581 A JP 386581A JP 386581 A JP386581 A JP 386581A JP S57118437 A JPS57118437 A JP S57118437A
Authority
JP
Japan
Prior art keywords
counter
output
input voltage
integrator
input
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
JP386581A
Other languages
Japanese (ja)
Inventor
Hiromi Imai
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 JP386581A priority Critical patent/JPS57118437A/en
Publication of JPS57118437A publication Critical patent/JPS57118437A/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
    • H03M1/12—Analogue/digital converters
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval
    • H03M1/52—Input signal integrated with linear return to datum

Landscapes

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

Abstract

PURPOSE:To obtain an A/D converter having the unexpensive squaring characteristics with a simple constitution, by applying the input voltage to the input of an integrator for a certain period of time and in different time cycles and then converting the input voltage into a digital quantity after counting it by a counter. CONSTITUTION:The input voltage -VIN and the reference voltage VREF are applied to an integrator 1 through analog switches SW1 and SW2 respectively. A voltage comparator 2 detects the zero cross of the output VO of the integrator 1, and the output of detection is applied to a timing control circuit 3. The circuit 3 works on the clock C1 of an oscillating circuit 4 to control a counter 51 as well as inputs A1 and A2 at one side of analog switches SW1 and SW2 plus AND gates G1 and G2 respectively. The output N1 of the counter 51 is applied as the input of a divider 61, and the output D of the divider 6 is applied to a counter 52 that counts the squared value. In such way, the digital value proportional to the square of the input voltage.
JP386581A 1981-01-16 1981-01-16 Analog-to-digital converter Pending JPS57118437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP386581A JPS57118437A (en) 1981-01-16 1981-01-16 Analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP386581A JPS57118437A (en) 1981-01-16 1981-01-16 Analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57118437A true JPS57118437A (en) 1982-07-23

Family

ID=11569081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP386581A Pending JPS57118437A (en) 1981-01-16 1981-01-16 Analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57118437A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60192024U (en) * 1984-05-25 1985-12-20 松下電工株式会社 Power supply for microprocessor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60192024U (en) * 1984-05-25 1985-12-20 松下電工株式会社 Power supply for microprocessor
JPH0530192Y2 (en) * 1984-05-25 1993-08-02

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