JPS55131783A - Ac contactless potentiometer - Google Patents

Ac contactless potentiometer

Info

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
Application number
JP3842879A
Other languages
Japanese (ja)
Inventor
Minoru Aoki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP3842879A priority Critical patent/JPS55131783A/en
Publication of JPS55131783A publication Critical patent/JPS55131783A/en
Pending legal-status Critical Current

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
JP3842879A 1979-04-02 1979-04-02 Ac contactless potentiometer Pending JPS55131783A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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