Circuit and method for sensing a differential capacitance
US9007074B2 · kind B2 · utility
1Cited by
7References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 26, 2012 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Mar 17, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit and a method for sensing differential capacitance involve using plural storing capacitors to repeatedly sample charges of the differential capacitance in an over-sampling manner, and storing the charges sampled in different transfer rounds into different storing capacitors instead of repeatedly transferring charges for a single storing capacitor, so as to collect charge averages about both inputs and noises and in turn effectively reduce RF interference and source noises.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.