JPS57152219A - Precision correcting circuit for analog-to-digital converter - Google Patents

Precision correcting circuit for analog-to-digital converter

Info

Publication number
JPS57152219A
JPS57152219A JP3637181A JP3637181A JPS57152219A JP S57152219 A JPS57152219 A JP S57152219A JP 3637181 A JP3637181 A JP 3637181A JP 3637181 A JP3637181 A JP 3637181A JP S57152219 A JPS57152219 A JP S57152219A
Authority
JP
Japan
Prior art keywords
converter
digital values
cpu1
analog
digital converter
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
JP3637181A
Other languages
Japanese (ja)
Inventor
Hiroshi Takizawa
Keisuke Hoshino
Yoshiaki Kono
Hajime Kakehi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3637181A priority Critical patent/JPS57152219A/en
Publication of JPS57152219A publication Critical patent/JPS57152219A/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
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters

Abstract

PURPOSE:To correct an error due to the variation of an A/D converter by comparing an invariably logical true value with a reference voltage, and correcting measurement data. CONSTITUTION:In a microcomputer CPU1, digital values D1-D3 which correspond to previously obtained reference voltages V1-V3 are stored. As measurement is started, voltage levels from reference voltage generators 4-6 are supplied through a changeover circuit 3 to an A/D converter 2 to obtain digital values D1'-D3'. Then, the CPU1 compares the digital values D1'-D3' with the digital values D1-D3 as true values to obtain a correction coefficient alpha. Then, when an analog signal from a sensor 7 is supplied to the A/D converter 2 through the changeover circuit 3, the CPU1 performs correction by using the correction coefficient alpha. Thus, an error due to the variation of the A/D converter is corrected.
JP3637181A 1981-03-13 1981-03-13 Precision correcting circuit for analog-to-digital converter Pending JPS57152219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3637181A JPS57152219A (en) 1981-03-13 1981-03-13 Precision correcting circuit for analog-to-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3637181A JPS57152219A (en) 1981-03-13 1981-03-13 Precision correcting circuit for analog-to-digital converter

Publications (1)

Publication Number Publication Date
JPS57152219A true JPS57152219A (en) 1982-09-20

Family

ID=12467973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3637181A Pending JPS57152219A (en) 1981-03-13 1981-03-13 Precision correcting circuit for analog-to-digital converter

Country Status (1)

Country Link
JP (1) JPS57152219A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029020A (en) * 1983-06-29 1985-02-14 Yamato Scale Co Ltd Analog-digital converter
JPS6068725A (en) * 1983-09-26 1985-04-19 Hitachi Ltd Analog-digital converter
JPS60112325A (en) * 1983-11-22 1985-06-18 Ohkura Electric Co Ltd Automatic correction signal processor
JPS60114033A (en) * 1983-11-16 1985-06-20 ジヨン・フルーク・マニユフアクチヤリング・カンパニー・インコーポレーテツド Correcting circuit of analog-to-digital converter
JP2006222654A (en) * 2005-02-09 2006-08-24 Denso Corp Comparator circuit
FR3021738A1 (en) * 2014-06-03 2015-12-04 Thales Sa ACQUISITION CHAIN OF AT LEAST ONE PHYSICAL SIZE, IN PARTICULAR FOR A CRITICAL AIRBORNE AVIONIC SYSTEM, AND METHOD OF ACQUIRING THE SAME
FR3021737A1 (en) * 2014-06-03 2015-12-04 Thales Sa ACQUISITION CHAIN OF AT LEAST ONE PHYSICAL SIZE FOR A CRITICALLY ADVANCED AVIONIC SYSTEM AND METHOD OF ACQUIRING THE SAME

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029020A (en) * 1983-06-29 1985-02-14 Yamato Scale Co Ltd Analog-digital converter
JPS6068725A (en) * 1983-09-26 1985-04-19 Hitachi Ltd Analog-digital converter
JPS60114033A (en) * 1983-11-16 1985-06-20 ジヨン・フルーク・マニユフアクチヤリング・カンパニー・インコーポレーテツド Correcting circuit of analog-to-digital converter
JPS60112325A (en) * 1983-11-22 1985-06-18 Ohkura Electric Co Ltd Automatic correction signal processor
JP2006222654A (en) * 2005-02-09 2006-08-24 Denso Corp Comparator circuit
JP4650011B2 (en) * 2005-02-09 2011-03-16 株式会社デンソー Comparator circuit
FR3021738A1 (en) * 2014-06-03 2015-12-04 Thales Sa ACQUISITION CHAIN OF AT LEAST ONE PHYSICAL SIZE, IN PARTICULAR FOR A CRITICAL AIRBORNE AVIONIC SYSTEM, AND METHOD OF ACQUIRING THE SAME
FR3021737A1 (en) * 2014-06-03 2015-12-04 Thales Sa ACQUISITION CHAIN OF AT LEAST ONE PHYSICAL SIZE FOR A CRITICALLY ADVANCED AVIONIC SYSTEM AND METHOD OF ACQUIRING THE SAME
WO2015185638A1 (en) * 2014-06-03 2015-12-10 Thales Chain for acquiring at least one physical quantity for a critical on-board avionics system and associated acquisition method
WO2015185637A1 (en) * 2014-06-03 2015-12-10 Thales System for acquisition of at least one physical variable, in particular for a critical on-board avionics system, and associated acquisition method
US10317244B2 (en) 2014-06-03 2019-06-11 Thales System for acquisition of at least one physical variable, in particular for a critical on-board avionics system, and associated acquisition method

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