Reconfigurable baseband filter
US7676211B2 · kind B2 · utility
8Cited by
13References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2004 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Jul 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2210/036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reconfigurable baseband filter for use in a multimode communication system is disclosed. One or more filter elements can each be configured as a plurality of sub-elements. The value of each of the filter elements can be varied by switching between at least two of the plurality of sub-elements. Switching noise within a desired passband can be reduced by switching at a rate that is greater than the desired passband. The switching noise in the passband can be further reduced by pseudo-randomly switching between the sub-elements. The filter can use a delta-sigma modulator to generate a pseudo-random switching signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.