JPS55120223A - Double integration type ad converter - Google Patents

Double integration type ad converter

Info

Publication number
JPS55120223A
JPS55120223A JP2712079A JP2712079A JPS55120223A JP S55120223 A JPS55120223 A JP S55120223A JP 2712079 A JP2712079 A JP 2712079A JP 2712079 A JP2712079 A JP 2712079A JP S55120223 A JPS55120223 A JP S55120223A
Authority
JP
Japan
Prior art keywords
switch
zero
contact
resistance
voltage
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
JP2712079A
Other languages
Japanese (ja)
Other versions
JPS6236408B2 (en
Inventor
Toshiaki Tsukada
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP2712079A priority Critical patent/JPS55120223A/en
Publication of JPS55120223A publication Critical patent/JPS55120223A/en
Publication of JPS6236408B2 publication Critical patent/JPS6236408B2/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
    • H03M1/12—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 make it possible to attain A/D conversion, zero correction and reduction in price by using only one reference voltage, by devising connections of switch methods. CONSTITUTION:Contact (a) of 2nd switch S22 is applied with input voltage Ex via 1st switch S21 and resistance R1 and zero-suppression voltage +Es via resistance R2, contact (b) of switch S22 is applied with negative reference voltage -Er via resistance R3, and common contact (c) of switch S22 is connected to the input terminal of integrator INT. In states (3) and (4), and (5) and (6), the sum of INT inputs is zero, forming equation (3). In the above-mentioned equation (3), count value (P2-P1) of counter UDC is that corresponding to Ex since R1, R3, Ex, Er, and T (fixed constant time) are constants respectively, so that analog input signal Ex will digitally be converted.
JP2712079A 1979-03-08 1979-03-08 Double integration type ad converter Granted JPS55120223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2712079A JPS55120223A (en) 1979-03-08 1979-03-08 Double integration type ad converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2712079A JPS55120223A (en) 1979-03-08 1979-03-08 Double integration type ad converter

Publications (2)

Publication Number Publication Date
JPS55120223A true JPS55120223A (en) 1980-09-16
JPS6236408B2 JPS6236408B2 (en) 1987-08-06

Family

ID=12212193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2712079A Granted JPS55120223A (en) 1979-03-08 1979-03-08 Double integration type ad converter

Country Status (1)

Country Link
JP (1) JPS55120223A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184325A (en) * 1981-05-09 1982-11-13 Ogasawara Keiki Seisakusho:Kk Resistance-digital converting method
JPS60143026A (en) * 1983-12-29 1985-07-29 Tokyo Sokki Kenkyusho:Kk A-d converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118961A (en) * 1977-03-26 1978-10-17 Omron Tateisi Electronics Co Analog-to-digital convertor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118961A (en) * 1977-03-26 1978-10-17 Omron Tateisi Electronics Co Analog-to-digital convertor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184325A (en) * 1981-05-09 1982-11-13 Ogasawara Keiki Seisakusho:Kk Resistance-digital converting method
JPS60143026A (en) * 1983-12-29 1985-07-29 Tokyo Sokki Kenkyusho:Kk A-d converter
JPH0126566B2 (en) * 1983-12-29 1989-05-24 Tokyo Sotsuki Kenkyusho Kk

Also Published As

Publication number Publication date
JPS6236408B2 (en) 1987-08-06

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