Circuit for measuring low capacitances
US4295091A · kind A · utility
51Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1979 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Dec 4, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitance to be measured is connected between the input and output of an inverting amplifier. A bistable circuit has an input connected to the output of the inverting amplifier and an output impedance inversely proportional to the capacitance to be measured. A resistive feedback is connected from the output of the bistable circuit to the input of the inverting amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.