Reducing electrometer time constant in measurements of high-resistance samples
Journal Article
·
· Instruments and Experimental Techniques
OSTI ID:133145
- Institute of Electron and Ion Optics, Moscow (Russian Federation)
The time constant of the input circuit of a measuring amplifier is reduced by including an amplifier in the feedback loop. This reduces the time constant by a factor of {vert_bar}K{vert_bar} + 1, where K is the amplifier gain. A circuit diagram of an electrometric amplifier used in measurements is given. The gain is about 1000, the input resistance {approximately}10{sup 15}{omega}, and the zero drift with a shorted input is 100 {mu}V/h.
- OSTI ID:
- 133145
- Journal Information:
- Instruments and Experimental Techniques, Journal Name: Instruments and Experimental Techniques Journal Issue: 3 Vol. 37; ISSN 0020-4412; ISSN INETAK
- Country of Publication:
- United States
- Language:
- English
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