JPS55146052A - Noise reduction circuit in noncontact type potentiometer - Google Patents
Noise reduction circuit in noncontact type potentiometerInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142363A (en) * | 1979-04-24 | 1980-11-06 | Canon Inc | Image forming device |
-
1979
- 1979-03-18 JP JP3137879A patent/JPS55146052A/en active Granted
Cited By (2)
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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