Programmable RC filter
US6437639B1 · kind B1 · utility
100Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jul 18, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable resistive-capacitive filter circuit enabling on-chip digital control of the frequency response includes a switched resistive type voltage divider network where one of the resistors forms an element of an RC filter and wherein the voltage divider additionally provides a DC bias on an output terminal. One preferred embodiment of the invention is directed to a programmable bandpass filter including MOSFET type semiconductor devices which are utilized as switched resistive elements of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.