Capacitance sensing with mismatch compensation
US8040143B2 · kind B2 · utility
4Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Feb 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960705
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods are provided for determining the value of a capacitance. A system for sensing capacitance comprises an oscillator arrangement comprising a plurality of oscillators and a mismatch compensation arrangement coupled between the oscillator arrangement and a first capacitive element having a first capacitance. The mismatch compensation arrangement is configured to selectively couple the first capacitive element to a respective oscillator of the plurality of oscillators, wherein an oscillation frequency of the respective oscillator is influenced by the first capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.