Detent switching of summing node capacitors of a delta-sigma modulator
US5351050A · kind A · utility
25Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1992 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Nov 3, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The thermal noise generated through the feedback capacitor of a delta-sigma modulator is attenuated by transferring a reference voltage through the capacitor in two separate steps during each sampling period. This permits a reduction in the size of the feedback capacitor, thereby reducing thermal noise, without increasing the voltage on the switching capacitors on the summing node side of the feedback capacitors which would induce degradation due to hot electron effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.