Measuring electrical impedance at various frequencies
US8102183B2 · kind B2 · utility
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3References
18Claims
0Family size
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Key dates
| Filing date | Dec 4, 2006 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/2509
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A logarithmic level detector (9) produces analog signals that represent logarithms of the voltage across, and current through, a target device (7). These signals are then passed to a processor (1) that performs a digital conversion. Because the digital conversion takes place after logarithmic conversion, it becomes possible to obtain an appropriate resolution for all signal levels, and a calculation of impedance of a target device, with reduced error, is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.