JPS55131783A - Ac contactless potentiometer - Google Patents
Ac contactless potentiometerInfo
- Publication number
- JPS55131783A JPS55131783A JP3842879A JP3842879A JPS55131783A JP S55131783 A JPS55131783 A JP S55131783A JP 3842879 A JP3842879 A JP 3842879A JP 3842879 A JP3842879 A JP 3842879A JP S55131783 A JPS55131783 A JP S55131783A
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- detection electrode
- amplifier
- case
- potential
- 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
Abstract
PURPOSE: To check the decrease in the input signal level due to the floating capacitance for higher sensitivity preventing possible AC potential difference by changing the potential of the conductor around the passage of the input signal including the detection electrode equal in the phase and the level to the input signal.
CONSTITUTION: The current-voltage converter is composed of a bootstrap circuit employing a non-reversal amplifier 18. The output is applied to the shield 17 of the signal input circuit comprising a case 13, a dielectric flux current generator 15 and the amplifier 18 while it is applied to positive/negative DC power source terminal of the amplifier 18 by way of a constant voltage source and a circuit with an amplification degree of about 1. The electric field generated from the body 12 to be measured reaches the detection electrode 16 in which an AC signal current is generated changing cyclically. The dielectric flux current generator 15 is solidly mounted to the case 13, and the detection electrode 16 changes in the potential as the case 13, the shield 17 and the like including the device 15 do. Thus, there is no AC potential difference. This allows the prevention of the drop in the input signal level due to a floating capacitance.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3842879A JPS55131783A (en) | 1979-04-02 | 1979-04-02 | Ac contactless potentiometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3842879A JPS55131783A (en) | 1979-04-02 | 1979-04-02 | Ac contactless potentiometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55131783A true JPS55131783A (en) | 1980-10-13 |
Family
ID=12525034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3842879A Pending JPS55131783A (en) | 1979-04-02 | 1979-04-02 | Ac contactless potentiometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55131783A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011043491A (en) * | 2009-04-30 | 2011-03-03 | Hioki Ee Corp | Voltage detection device and line voltage detection device |
JP2011053201A (en) * | 2009-04-30 | 2011-03-17 | Hioki Ee Corp | Voltage detection device and line voltage detection device |
-
1979
- 1979-04-02 JP JP3842879A patent/JPS55131783A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011043491A (en) * | 2009-04-30 | 2011-03-03 | Hioki Ee Corp | Voltage detection device and line voltage detection device |
JP2011053201A (en) * | 2009-04-30 | 2011-03-17 | Hioki Ee Corp | Voltage detection device and line voltage detection device |
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