Impedance measuring device
US4404517A · kind A · utility
4Cited by
6References
12Claims
0Family size
Inventor
Key dates
| Filing date | Oct 6, 1980 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Oct 6, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An impedance measuring device having a signal source (10) for providing a first signal (e1) having a given frequency, a given amplitude and a given waveform; a differentiation circuit (14) which includes an unknown impedance element, for differentiating the first signal and providing a second signal (e3); and a peak voltmeter (12) for measuring the unknown impedance element whose impedance value is proportional to an amplitude of the second signal and is displayed by the peak voltmeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.