Capacitance to code converter with sigma-delta modulator
US8547114B2 · kind B2 · utility
401Cited by
211References
58Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2006 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M11/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for converting a capacitance measured on a sensor element to a digital code. The apparatus may include a switching capacitor as a sensor element of a sensing device, and a sigma-delta modulator coupled to the sensor element to convert a capacitance measured on the sensor element to a digital code. The switching capacitor is in a feedback loop of the sigma-delta modulator. The method may include measuring a capacitance on a sensor element of a sensing device using a sigma-delta modulator, and converting the capacitance measured on the sensor element to a digital code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.