JPS58193212U - displacement conversion circuit - Google Patents
displacement conversion circuitInfo
- Publication number
- JPS58193212U JPS58193212U JP9150382U JP9150382U JPS58193212U JP S58193212 U JPS58193212 U JP S58193212U JP 9150382 U JP9150382 U JP 9150382U JP 9150382 U JP9150382 U JP 9150382U JP S58193212 U JPS58193212 U JP S58193212U
- Authority
- JP
- Japan
- Prior art keywords
- conversion circuit
- displacement
- current
- capacitance
- constant current
- 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
- 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
第１図および第２図は従来の静電容量式差圧発信器の回
路構成を示す回路図、第３図は本件出願、人によって既
に提案されている変位変換回路の回路図、第４図および
第５図は本考案のそれぞれ異なる実施例の回路構成を示
す回路図である。
ＯＳＣ・・・交流電圧発振器、Ｗ１〜Ｗ３・・・出カド
ランス巻線、］゛１・・・電界効果トランジスタ、Ｑｌ
・・・演算増幅器、Ｃｓ・・・浮遊容量、Ｃｃ−・・補
償容量。 −第１図
第２図Figures 1 and 2 are circuit diagrams showing the circuit configuration of a conventional capacitive differential pressure transmitter, Figure 3 is a circuit diagram of a displacement conversion circuit already proposed by the present application, and Figure 4. and FIG. 5 are circuit diagrams showing circuit configurations of different embodiments of the present invention. OSC...AC voltage oscillator, W1-W3...output transformer winding, ]゛1...field effect transistor, Ql
...Operation amplifier, Cs...Stray capacitance, Cc-...Compensation capacitance. -Figure 1Figure 2
Claims (1)
２の差と和との比に比例した電圧を取出す変位変換回路
において、前記両静電容量Ｃ，，Ｃ２のそれぞれに比例
した直流電流Ｉ□＋ １２を得る手段と、前記直流電流
Ｉ□＋ Ｉ２の和を一定化する定電流手段と、前記静電
容量に付随した浮遊容量の影響を補償する補償容量Ｃｃ
と、その補償容量Ｃｃの負および正の充電電流をそれぞ
れ形成する整流手段ＤＣ□、ＤＣ２と、前記定電流手段
をなす電界効果トランジスタのドレイン電圧を横手する
検知手段Ｑ１とを有し、一方の前記整流手段ＤＣ□によ
る負の充電電流を前記定電流手段をなす抵抗に流すとと
もに、他方の前記整流手段ＤＣ２による正の充電電流を
前記検知手段Ｑ□に流すようにしたことを特徴とする変
位変換回路。Capacitance C□, C that changes differentially depending on mechanical displacement
2, the displacement conversion circuit extracts a voltage proportional to the difference between the sum and the difference between the two capacitances C, , C2, and the DC current I□+. constant current means for making the sum of I2 constant; and a compensation capacitor Cc for compensating for the influence of stray capacitance associated with the capacitance.
, rectifying means DC□, DC2 for respectively forming negative and positive charging currents of the compensation capacitor Cc, and detecting means Q1 for measuring the drain voltage of the field effect transistor constituting the constant current means; A displacement characterized in that a negative charging current by the rectifying means DC□ is caused to flow through a resistor forming the constant current means, and a positive charging current by the other rectifying means DC2 is caused to flow through the detecting means Q□. conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9150382U JPS58193212U (en) | 1982-06-21 | 1982-06-21 | displacement conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9150382U JPS58193212U (en) | 1982-06-21 | 1982-06-21 | displacement conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58193212U true JPS58193212U (en) | 1983-12-22 |
| JPH0136083Y2 JPH0136083Y2 (en) | 1989-11-02 |
Family
ID=30099868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9150382U Granted JPS58193212U (en) | 1982-06-21 | 1982-06-21 | displacement conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58193212U (en) |
-
1982
- 1982-06-21 JP JP9150382U patent/JPS58193212U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0136083Y2 (en) | 1989-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58193212U (en) | displacement conversion circuit | |
| JPS59180619U (en) | capacitive converter | |
| JPS60127509U (en) | capacitive converter | |
| JPS6092113U (en) | capacitive converter | |
| JPS6011601Y2 (en) | Non-contact potentiometer | |
| JPS6146698U (en) | displacement converter | |
| JPS59166122U (en) | Capacitance voltage conversion circuit | |
| JPS60134115U (en) | capacitive converter | |
| JPS59166124U (en) | Capacitance voltage conversion circuit | |
| JPS5836320U (en) | Capacitive liquid level sensor | |
| JPS5896317U (en) | oscillation circuit | |
| JPH0120647Y2 (en) | ||
| JPS58110813U (en) | Capacitance voltage conversion circuit | |
| JPS58127313U (en) | capacitive converter | |
| JPS58189913U (en) | Level | |
| JPS58135845U (en) | Differential delay capacitive sensor | |
| JPS5857774U (en) | Moving object detection device | |
| JPS59161021U (en) | displacement transducer | |
| JPS6127U (en) | Liquid level measurement circuit | |
| JPS58107644U (en) | Light interruption detection circuit | |
| JPH0424087U (en) | ||
| JPS6134468U (en) | External noise suppression circuit for Polaro type densitometer | |
| JPS594471U (en) | Simple frequency-voltage conversion circuit | |
| JPS58175427U (en) | capacitive level switch | |
| JPS59144515U (en) | capacitive converter |