Capacitance to code converter with sigma-delta modulator
US9154160B2 · kind B2 · utility
10Cited by
374References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2011 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Jun 10, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M11/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method of converting a capacitance measured on a sensor element to a digital value. The apparatus may include a switching capacitor as a sensor element, a modulation circuit coupled to the sensor element, and a switching circuit having a plurality of switches controlled by a variable-period clock. The modulation circuit is configured to measure a capacitance on the sense element and to convert the measured capacitance to a digital value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.