JPS55146052A - Noise reduction circuit in noncontact type potentiometer - Google Patents

Noise reduction circuit in noncontact type potentiometer

Info

Publication number
JPS55146052A
JPS55146052A JP3137879A JP3137879A JPS55146052A JP S55146052 A JPS55146052 A JP S55146052A JP 3137879 A JP3137879 A JP 3137879A JP 3137879 A JP3137879 A JP 3137879A JP S55146052 A JPS55146052 A JP S55146052A
Authority
JP
Japan
Prior art keywords
resistance
operational amplifier
output
noise reduction
reduction circuit
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
Application number
JP3137879A
Other languages
Japanese (ja)
Other versions
JPS6351269B2 (en
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 JP3137879A priority Critical patent/JPS55146052A/en
Publication of JPS55146052A publication Critical patent/JPS55146052A/en
Publication of JPS6351269B2 publication Critical patent/JPS6351269B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE: To enable high sensitivity of the potentiometer, by easily reducing the noise component produced in the signal, through the provision of the resistance and capacitor between the input and output of the operational amplifier and connecting the variable voltage source.
CONSTITUTION: The electric field corresponding to the surface potential of measured object M is modulated at the means VS through the hole Sa of the shield plane S, flows to the detection electrode E and is converted into a voltage with the operational amplifier OA and is fed to the terminal O and the shield plane S. The parallel circuit of the resistance R2 and the capacitor C1 is connected between the inverting input terminal and the output terminal O of the operational amplifier OA, and the variable voltage source VR is connected via the resistance R1. Further, by adjusting the position of the slider of VR, the signal not including the noise component based on the contact potential difference at the process of detection is obtained at the output of OA.
COPYRIGHT: (C)1980,JPO&Japio
JP3137879A 1979-03-18 1979-03-18 Noise reduction circuit in noncontact type potentiometer Granted JPS55146052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3137879A JPS55146052A (en) 1979-03-18 1979-03-18 Noise reduction circuit in noncontact type potentiometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3137879A JPS55146052A (en) 1979-03-18 1979-03-18 Noise reduction circuit in noncontact type potentiometer

Publications (2)

Publication Number Publication Date
JPS55146052A true JPS55146052A (en) 1980-11-14
JPS6351269B2 JPS6351269B2 (en) 1988-10-13

Family

ID=12329584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3137879A Granted JPS55146052A (en) 1979-03-18 1979-03-18 Noise reduction circuit in noncontact type potentiometer

Country Status (1)

Country Link
JP (1) JPS55146052A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142363A (en) * 1979-04-24 1980-11-06 Canon Inc Image forming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55142363A (en) * 1979-04-24 1980-11-06 Canon Inc Image forming device
JPS6361663B2 (en) * 1979-04-24 1988-11-29

Also Published As

Publication number Publication date
JPS6351269B2 (en) 1988-10-13

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