Capacitance sensing circuits and methods
US8614587B1 · kind B1 · utility
13Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960725
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitance sense system can include a capacitance sense input configured to receive an input signal that varies according to a sensed capacitance; an integrator/discharge circuit configured to integrate the input signal and discharge the integrated input signal toward the reference level in conversion operations; and a remainder retainer section configured to quantize the discharging of the integrated input signal, and retain any remainder of the integrated input signal that follows a quantization point for a next conversion by the integrator/discharge circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.