Switched capacitor filter for low voltage applications
US4716319A · kind A · utility
11Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/303
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved switched capacitor circuit configuration is disclosed which exhibits improved low voltage supply operation and improved charge injection cancellation performance. In the preferred embodiment of a switched capacitor integrator, the improvement is realized by the particular configuration of a switched tub switch on the input, single N-channel devices at the summing junction, skewing the analog ground V.sub.AG downward, and delaying the clock signals to turn off the switches at the summing junction before the charge injection of the switched tub switch is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.