JPS59183609U - Capacitance voltage conversion circuit - Google Patents
Capacitance voltage conversion circuitInfo
- Publication number
- JPS59183609U JPS59183609U JP7726583U JP7726583U JPS59183609U JP S59183609 U JPS59183609 U JP S59183609U JP 7726583 U JP7726583 U JP 7726583U JP 7726583 U JP7726583 U JP 7726583U JP S59183609 U JPS59183609 U JP S59183609U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- conversion circuit
- voltage conversion
- output
- sensor amplifier
- 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
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Resistance Or Impedance (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
第１図は従来回路の一例を示す接続図、第２図は本考案
回路の一実施例を示す接続図、第３図はその動作説明の
ための波形図、第４図は本考案回路の他の実施例を示す
接続図である。
１・・・可変コンデンサ、２川センサアンプ、３・・・
抵抗、４・・・固定コンデンサ、７・・・直流の基準電
圧“源、８・・・スイッチ、９・・・反転／非反転切換
形アンプ、１０・・・平均値回路、１１・・・発振器、
１２・・田−パスフィルタ。Fig. 1 is a connection diagram showing an example of a conventional circuit, Fig. 2 is a connection diagram showing an embodiment of the circuit of the present invention, Fig. 3 is a waveform diagram for explaining its operation, and Fig. 4 is a diagram of the circuit of the present invention. FIG. 7 is a connection diagram showing another embodiment. 1... variable capacitor, 2 river sensor amplifier, 3...
Resistor, 4... Fixed capacitor, 7... DC reference voltage source, 8... Switch, 9... Inverting/non-inverting switching amplifier, 10... Average value circuit, 11... oscillator,
12... field-pass filter.
Claims (1)
の可変コンデンサおよび抵抗が帰還回路に接続され、一
定容量の固定コンデンサが入力回路に接続されたセンサ
アンプと、このセンサアンプの入力に直流の基準電圧源
からの一定電圧をオンオフして加えるためのスイッチと
、前記センサアンプの出力を前記スイッチと同期して反
転と非 ゛反転とに交互に切換えて増幅した後平均化す
る回路とを具えた容量電圧変換回路。A variable capacitor whose capacitance changes depending on the quantity to be measured is connected to a sensor amplifier, which has a variable capacitor and a resistor connected to a feedback circuit, a fixed capacitor with a constant capacitance connected to an input circuit, and a DC current connected to the input of this sensor amplifier. A switch for applying a constant voltage from a reference voltage source on and off, and a circuit that alternately switches the output of the sensor amplifier between inversion and non-inversion in synchronization with the switch, amplifies the output, and then averages the output. capacitive voltage conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7726583U JPS59183609U (en) | 1983-05-23 | 1983-05-23 | Capacitance voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7726583U JPS59183609U (en) | 1983-05-23 | 1983-05-23 | Capacitance voltage conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59183609U true JPS59183609U (en) | 1984-12-06 |
| JPH0412464Y2 JPH0412464Y2 (en) | 1992-03-25 |
Family
ID=30207297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7726583U Granted JPS59183609U (en) | 1983-05-23 | 1983-05-23 | Capacitance voltage conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59183609U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012037439A (en) * | 2010-08-10 | 2012-02-23 | Asahi Kasei Electronics Co Ltd | Electrostatic capacitance detection circuit |
-
1983
- 1983-05-23 JP JP7726583U patent/JPS59183609U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012037439A (en) * | 2010-08-10 | 2012-02-23 | Asahi Kasei Electronics Co Ltd | Electrostatic capacitance detection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0412464Y2 (en) | 1992-03-25 |
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