Sensor and sigma-delta converter
US6888358B2 · kind B2 · utility
61Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2001 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Jun 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/474
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sensor for determining at least one parameter with a sigma-delta converter (1) comprises switched input capacitors and feedback capacitors (Cf1, Cf2, Crefc1, Crefc2, Creff1, Creff2, Crt1, Crt2, Cr1, Cr2, Ctemp1, Ctemp2, Cs1, Cs2). At least one of the capacitors is designed such that its capacitance depends on the parameter to be determined. In this way, the change of capacitance can be directly determined by means of the sigma-delta converter. Due to a symmetric design of the converter a higher accuracy can be reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.