JPS58127313U - capacitive converter - Google Patents

capacitive converter

Info

Publication number
JPS58127313U
JPS58127313U JP2431582U JP2431582U JPS58127313U JP S58127313 U JPS58127313 U JP S58127313U JP 2431582 U JP2431582 U JP 2431582U JP 2431582 U JP2431582 U JP 2431582U JP S58127313 U JPS58127313 U JP S58127313U
Authority
JP
Japan
Prior art keywords
pair
variable capacitors
oscillator
operational amplifier
average value
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
JP2431582U
Other languages
Japanese (ja)
Other versions
JPH0120648Y2 (en
Inventor
平田　輝孝
Original Assignee
横河電機株式会社
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 横河電機株式会社 filed Critical 横河電機株式会社
Priority to JP2431582U priority Critical patent/JPS58127313U/en
Publication of JPS58127313U publication Critical patent/JPS58127313U/en
Application granted granted Critical
Publication of JPH0120648Y2 publication Critical patent/JPH0120648Y2/ja
Granted legal-status Critical Current

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  • Measuring Fluid Pressure (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来装置の一例を示す接続図、第２図・−は本
考案装置の一実施例を示す接続図、第３図および第４図
は本考案装置の他の実施例を示す接続図である。 Ｃ１，Ｃ２・・・可変コンデンサ、Ｄ１〜Ｄ６・・・り
゛イオード、Ｃｆ工〜Ｃｆ２・・・平滑用コンデンサ、
Ｏ２０・・・発振′器、Ｔ・・・トランス、ＯＰ１〜Ｏ
Ｐ３・・・演算増幅器、Ｃ０Ｎ１．　ＣＯＮ２・・・電
流・電圧変換回路、■ＮＴ・・・積分器。Fig. 1 is a connection diagram showing an example of a conventional device, Figs. 2 and 4 are connection diagrams showing an embodiment of the device of the present invention, and Figs. It is a diagram. C1, C2...variable capacitor, D1~D6...rediode, Cf~Cf2...smoothing capacitor,
O20... Oscillator, T... Transformer, OP1~O
P3... operational amplifier, C0N1. CON2...Current/voltage conversion circuit, ■NT...Integrator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 被測定量に応じて容量が差動的に変化する一対の可変コ
ンデンサと、この一対の可変コンデンサに発振出力を印
加する発振器と、前記一対の可変コンデンサの容量の和
に対応した平均値電流と基準電流との差を積分し、その
積分結果で前記発振器を制御する演算増幅器を用いた積
分器と、前記一対の可変コンデンサの容量の差に対応し
た平均値電流を出力電圧に変換する演算増幅器を用いた
電流・電圧変換回路とを有してなる容量式変換製A pair of variable capacitors whose capacitance differentially changes depending on the measured quantity, an oscillator that applies an oscillation output to the pair of variable capacitors, and an average value current corresponding to the sum of the capacitances of the pair of variable capacitors. An integrator using an operational amplifier that integrates the difference from a reference current and controls the oscillator using the integration result, and an operational amplifier that converts the average value current corresponding to the difference in capacitance of the pair of variable capacitors into an output voltage. A capacitive conversion device comprising a current/voltage conversion circuit using
JP2431582U 1982-02-23 1982-02-23 capacitive converter Granted JPS58127313U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2431582U JPS58127313U (en) 1982-02-23 1982-02-23 capacitive converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2431582U JPS58127313U (en) 1982-02-23 1982-02-23 capacitive converter

Publications (2)

Publication Number Publication Date
JPS58127313U true JPS58127313U (en) 1983-08-29
JPH0120648Y2 JPH0120648Y2 (en) 1989-06-21

Family

ID=30036318

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2431582U Granted JPS58127313U (en) 1982-02-23 1982-02-23 capacitive converter

Country Status (1)

Country Link
JP (1) JPS58127313U (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444541U (en) * 1978-08-04 1979-03-27
JPS5525364U (en) * 1978-08-07 1980-02-19
JPS5647529U (en) * 1979-09-20 1981-04-27

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444541B2 (en) * 1974-10-09 1979-12-26

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444541U (en) * 1978-08-04 1979-03-27
JPS5525364U (en) * 1978-08-07 1980-02-19
JPS5647529U (en) * 1979-09-20 1981-04-27

Also Published As

Publication number Publication date
JPH0120648Y2 (en) 1989-06-21

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