JPH0344570A - Temperature compensation circuit of c-v converter using inverting operational amplifier - Google Patents

Temperature compensation circuit of c-v converter using inverting operational amplifier

Info

Publication number
JPH0344570A
JPH0344570A JP17948989A JP17948989A JPH0344570A JP H0344570 A JPH0344570 A JP H0344570A JP 17948989 A JP17948989 A JP 17948989A JP 17948989 A JP17948989 A JP 17948989A JP H0344570 A JPH0344570 A JP H0344570A
Authority
JP
Japan
Prior art keywords
resistance
change
ω
temperature
thermistor
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
JP17948989A
Other versions
JPH0690248B2 (en
Inventor
Seijiro Nosaka
Original Assignee
Nippon Denshi Gijutsu:Kk
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 Nippon Denshi Gijutsu:Kk filed Critical Nippon Denshi Gijutsu:Kk
Priority to JP17948989A priority Critical patent/JPH0690248B2/en
Publication of JPH0344570A publication Critical patent/JPH0344570A/en
Publication of JPH0690248B2 publication Critical patent/JPH0690248B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Abstract

PURPOSE: To execute temperature compensation accurately by a method wherein a parallel circuit of a resistance and a thermistor is inserted in series with a resistance into a feedback circuit of an amplifier, the resistance connected in series to the thermistor is selected so that an input reactance will be irrelevant to temperature and only a voltage drop of the other resistance is outputted.
CONSTITUTION: An input impedance Z of an operational amplifier OP1 of a C-V converter 12 is expressed by R + jXL, and a reactance XL is expressed by ωRf/ω0A0 (ω is an angular frequency to be used, ω0 a 3dB-lowered angular frequency, and A0 a DC open loop gain). Since the absolute value of a resistance R is small and the sum of vectors herein, the effect of a change in temperature thereon can be neglected. A change in the reactance XL is caused by a change in ω0A0 due to the temperature. However, by setting a feedback resistance Rf to be Rf = (R2RT/R2 + RT) + R1 and by selecting an appropriate resistance R2, a change in Rf can be made equal to ω0A0, since a thermistor resistance RT is designed to take part in the feedback resistance Rf. Accordingly, an error in indication due to a change in the temperature of a C meter and a change in the indication caused by a capacitance between a terminal Hp and the ground can be made very small.
COPYRIGHT: (C)1991,JPO&Japio
JP17948989A 1989-07-12 1989-07-12 Temperature compensation circuit of c-v converter using an inverting type operational amplifier Expired - Lifetime JPH0690248B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17948989A JPH0690248B2 (en) 1989-07-12 1989-07-12 Temperature compensation circuit of c-v converter using an inverting type operational amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17948989A JPH0690248B2 (en) 1989-07-12 1989-07-12 Temperature compensation circuit of c-v converter using an inverting type operational amplifier

Publications (2)

Publication Number Publication Date
JPH0344570A true JPH0344570A (en) 1991-02-26
JPH0690248B2 JPH0690248B2 (en) 1994-11-14

Family

ID=16066720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17948989A Expired - Lifetime JPH0690248B2 (en) 1989-07-12 1989-07-12 Temperature compensation circuit of c-v converter using an inverting type operational amplifier

Country Status (1)

Country Link
JP (1) JPH0690248B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076955A1 (en) * 2002-03-06 2003-09-18 Medtronic, Inc. Current-to-voltage converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076955A1 (en) * 2002-03-06 2003-09-18 Medtronic, Inc. Current-to-voltage converter
US6908535B2 (en) 2002-03-06 2005-06-21 Medtronic, Inc. Current-to-voltage-converter for a biosensor

Also Published As

Publication number Publication date
JPH0690248B2 (en) 1994-11-14

Similar Documents

Publication Publication Date Title
JPH04282912A (en) Circuit and method for tuning continuous-time filter
GB1574457A (en) Automatic two-point bridge calibration system
US3778705A (en) Susceptance measuring system for indicating condition of a material
JPH0284805A (en) Ac amplifier for digitally controlled to response frequency
JPS5514725A (en) Error amplifier circuit
Blecher Application of Synthesis Techniques to Electronic Circuit De-sign
GB1476278A (en) Negative impedance repeater
JPH03234110A (en) Frequency characteristic variable circuit
JPS54160150A (en) Frequency selecting circuit
JPH04168876A (en) Integrator and picture reader
US5708377A (en) Low power dual sampler utilizing step recovery diodes (SRDS)
JPH0329801A (en) Method for compensating for temperature dependency of output signal
JPH01108801A (en) Temperature compensation type piezo-oscillator
JPS6184535A (en) Crystal type gas manometer
US6259259B1 (en) Method and apparatus for automatically adjusting the measurement range of admittance level sensors
JPS5972205A (en) Frequency varying method of lc oscillator for analog value detection
JPH02155305A (en) Filter device
JPH04263503A (en) Mixer
US4992740A (en) Apparatus which uses a simulated inductor in the measurement of an electrical parameter of a device under test
US5045786A (en) Circuit for measuring a variable inductance connected in series with a fixed inductance
JPS5683135A (en) Pll circuit
Fabre et al. Insensitive current-mode bandpass implementations-based nonideal gyrators
EP0264171A3 (en) Gain selectable amplifier with resonance compensation
JPS57135370A (en) Level detecting circuit
JPS60141006A (en) Impedance synthesis circuit