JPS59168168U - Capacitance voltage conversion circuit - Google Patents
Capacitance voltage conversion circuitInfo
- Publication number
- JPS59168168U JPS59168168U JP6270783U JP6270783U JPS59168168U JP S59168168 U JPS59168168 U JP S59168168U JP 6270783 U JP6270783 U JP 6270783U JP 6270783 U JP6270783 U JP 6270783U JP S59168168 U JPS59168168 U JP S59168168U
- Authority
- JP
- Japan
- Prior art keywords
- conversion circuit
- sample
- voltage conversion
- sensor amplifier
- capacitor
- 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)
- Dc-Dc Converters (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図は従来の変換回路の一例を示す接続図、第２図は
本考案変換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、第５図および第６図
は本考案変換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・・・センサアンプ、３・
・・抵抗、４・・・固定コンデンサ、７・・・発振器、
８，９・・・サンプルホールド回路、１０・・・減算器
、１１・・・増幅器、１２・・・スイッチ、１３・・・
直流の基準電圧源。Fig. 1 is a connection diagram showing an example of a conventional conversion circuit, Fig. 2 is a connection diagram showing an embodiment of the conversion circuit of the present invention, Fig. 3 is a waveform diagram for explaining its operation, Figs. 5 and 6 are connection diagrams showing other embodiments of the conversion circuit of the present invention. 1... Variable capacitor, 2... Sensor amplifier, 3...
...Resistance, 4...Fixed capacitor, 7...Oscillator,
8, 9...Sample hold circuit, 10...Subtractor, 11...Amplifier, 12...Switch, 13...
DC reference voltage source.
Claims (1)
の可変コンデンササおよび抵抗が帰環回路に接続されて
いるセンサアンプと、このセンサー アンプの入力に
一定容量の固定コンデンサを介して一定振幅の矩形波電
圧を印加する手段と、前記センサアンプの出力を直接ま
たは増幅器を介した後前記矩形波電圧と同期してサンプ
リングする２個のサンプルホールド・回路と、これら２
個のサンプルホールド回路のホールド値の減算を行う減
算冊本具えた容量電圧変換回路。A variable capacitor whose capacitance changes depending on the quantity to be measured, a sensor amplifier in which this variable capacitor and resistor are connected to a return circuit, and a fixed amplitude capacitor connected to the input of this sensor amplifier through a fixed capacitor with a constant capacitance. means for applying a rectangular wave voltage; two sample and hold circuits that sample the output of the sensor amplifier directly or after passing through an amplifier in synchronization with the rectangular wave voltage;
A capacitive voltage conversion circuit equipped with a subtraction book that performs subtraction of the hold values of sample and hold circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6270783U JPS59168168U (en) | 1983-04-26 | 1983-04-26 | Capacitance voltage conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6270783U JPS59168168U (en) | 1983-04-26 | 1983-04-26 | Capacitance voltage conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59168168U true JPS59168168U (en) | 1984-11-10 |
| JPH049581Y2 JPH049581Y2 (en) | 1992-03-10 |
Family
ID=30192896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6270783U Granted JPS59168168U (en) | 1983-04-26 | 1983-04-26 | Capacitance voltage conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59168168U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327677A (en) * | 1995-05-26 | 1996-12-13 | Nec Corp | Detection circuit and detection method for capacitive sensor |
| JP2012233730A (en) * | 2011-04-28 | 2012-11-29 | Seiko Epson Corp | Physical quantity detector and electronic apparatus |
-
1983
- 1983-04-26 JP JP6270783U patent/JPS59168168U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327677A (en) * | 1995-05-26 | 1996-12-13 | Nec Corp | Detection circuit and detection method for capacitive sensor |
| JP2012233730A (en) * | 2011-04-28 | 2012-11-29 | Seiko Epson Corp | Physical quantity detector and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH049581Y2 (en) | 1992-03-10 |
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