Switched capacitor filter
US6891429B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H19/004
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention relate to a switched-capacitor filter which comprises a first stage which itself comprises a first switched capacitor, a second stage which itself comprises a second switched capacitor, a switched capacitive element that couples the output of the first stage to the input of the second stage, and a non-switched capacitive element coupled from the output of the second stage to the input of the first stage to provide damping of the switched-capacitor filter. Both stages are implemented as inverting analog amplifiers and the filter is especially well suited to semiconductor manufacture. The switched capacitor filter is implemented as part of a user module in a programmable system on a chip, or PSoC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.