JPS60134115U - capacitive converter - Google Patents
capacitive converterInfo
- Publication number
- JPS60134115U JPS60134115U JP2006084U JP2006084U JPS60134115U JP S60134115 U JPS60134115 U JP S60134115U JP 2006084 U JP2006084 U JP 2006084U JP 2006084 U JP2006084 U JP 2006084U JP S60134115 U JPS60134115 U JP S60134115U
- Authority
- JP
- Japan
- Prior art keywords
- output
- detection circuit
- circuit
- capacitor
- temperature
- 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
Links
Landscapes
- 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
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。
１１・・・可変コンデンサ、１２・・・固定コンチン
□す、２０」・・発振器、３１．３２・・・検出回路
、４０・・・制御回路、５０・・・減算回路、６０・・
・温度補償回路。Fig. 1 is a connection diagram showing an example of a conventional device, Fig. 2 is a connection diagram showing an embodiment of the device of the present invention, and Figs. 3 and 4 are connection diagrams showing other embodiments of the device of the present invention. It is a diagram. 11...Variable capacitor, 12...Fixed capacitor
□Su, 20''...Oscillator, 31.32...Detection circuit, 40...Control circuit, 50...Subtraction circuit, 60...
・Temperature compensation circuit.
Claims (1)
測定量に無関係に容量が一定な固定コンデンサと、前記
可変コンデンサと固定コンデンサに発振出力を印加する
発振器と、整流用ダイオードを含み前記可変コンデンサ
を流れる交流電流を直流信号として検出する第１の検出
回路と、整流用ダイオードを含み前記固定コンデンサを
流れる交流電流を直流信号として検出する第２の検出回
路と、前記第２の検出回路の出力・と第１の検出回路の
出力との差を演算して、出力信号を得る回路と、温度セ
ンサを有し、周囲温度と基準温度との差に関連した温度
補償信号を発生する温度補償回路と、前記第１の検出回
路の出力と前記温度補償回路の出力の和が一定になるよ
うに前記発振器の発振出力を制御する回路とを具備した
ことを特徴とする容量式変換装置。The variable capacitor includes a variable capacitor whose capacitance changes depending on the measured quantity, a fixed capacitor whose capacitance is constant regardless of the measured quantity, an oscillator that applies an oscillation output to the variable capacitor and the fixed capacitor, and a rectifying diode. a first detection circuit that detects the alternating current flowing through the capacitor as a direct current signal; a second detection circuit that includes a rectifying diode and detects the alternating current flowing through the fixed capacitor as a direct current signal; and the second detection circuit. A temperature compensation circuit that calculates the difference between the output of the output and the output of the first detection circuit to obtain an output signal, and a temperature sensor that generates a temperature compensation signal related to the difference between the ambient temperature and the reference temperature. A capacitive conversion device comprising: a circuit; and a circuit for controlling the oscillation output of the oscillator so that the sum of the output of the first detection circuit and the output of the temperature compensation circuit is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006084U JPS60134115U (en) | 1984-02-15 | 1984-02-15 | capacitive converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006084U JPS60134115U (en) | 1984-02-15 | 1984-02-15 | capacitive converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60134115U true JPS60134115U (en) | 1985-09-06 |
Family
ID=30510200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006084U Pending JPS60134115U (en) | 1984-02-15 | 1984-02-15 | capacitive converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60134115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03137568A (en) * | 1989-10-23 | 1991-06-12 | Murata Mfg Co Ltd | Device for detecting moving object electrostatically |
-
1984
- 1984-02-15 JP JP2006084U patent/JPS60134115U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03137568A (en) * | 1989-10-23 | 1991-06-12 | Murata Mfg Co Ltd | Device for detecting moving object electrostatically |
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