JPS56140266A - Detecting system of resistance sensor - Google Patents

Detecting system of resistance sensor

Info

Publication number
JPS56140266A
JPS56140266A JP4375880A JP4375880A JPS56140266A JP S56140266 A JPS56140266 A JP S56140266A JP 4375880 A JP4375880 A JP 4375880A JP 4375880 A JP4375880 A JP 4375880A JP S56140266 A JPS56140266 A JP S56140266A
Authority
JP
Japan
Prior art keywords
value
resistance sensor
resistance
standard resistor
constitution
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
JP4375880A
Other languages
Japanese (ja)
Inventor
Tadashi Azegami
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
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP4375880A priority Critical patent/JPS56140266A/en
Publication of JPS56140266A publication Critical patent/JPS56140266A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value

Abstract

PURPOSE:To obtain the resistance value of a resistance sensor having little amount of errors due to a noise or the like with few parts by connecting one resistance sensor and one standard resistor in series, taking out a signal by flowing a current in normal and reverse directions alternately and treating it. CONSTITUTION:After connecting the standard resistor Ro and the resistance sensor Rt in series, a current source voltage E is applied in the normal and reverse directions altermately by on-off action of switches a1, a2, b1, and b2, and then a signal corresponding to a value of the standard resistor Ro and the resistance senser Rt is taken out alternately by a switch a3 or b3 respectively. The taken-out voltage is held in holding circuit having resistors R1 and R2 and capacitors C1 and C2, and provided to a noninversion input and an inversion input of an operational amplifier A1 respectively, whereby a voltage difference between both inputs is outputted as a detecting output Do. By this constitution, a given operation having a sum of a value r1 of said Rt and a value ro of said Ro as a denominator is performed, whereby an uniform change having the same direction with r1 and r2 and an influence of a synchronous noise component are removed from the detecting output Do.
JP4375880A 1980-04-02 1980-04-02 Detecting system of resistance sensor Pending JPS56140266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4375880A JPS56140266A (en) 1980-04-02 1980-04-02 Detecting system of resistance sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4375880A JPS56140266A (en) 1980-04-02 1980-04-02 Detecting system of resistance sensor

Publications (1)

Publication Number Publication Date
JPS56140266A true JPS56140266A (en) 1981-11-02

Family

ID=12672653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4375880A Pending JPS56140266A (en) 1980-04-02 1980-04-02 Detecting system of resistance sensor

Country Status (1)

Country Link
JP (1) JPS56140266A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0486901A2 (en) * 1990-11-21 1992-05-27 National Semiconductor Corporation Ferroelectric random access memory and methods of its operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0486901A2 (en) * 1990-11-21 1992-05-27 National Semiconductor Corporation Ferroelectric random access memory and methods of its operation

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