Hybrid DC offset cancellation scheme for wireless receiver
US7215266B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2004 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | May 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods for canceling static and dynamic DC offsets by combining a digital DC offset correction scheme with an analog DC offset correction scheme. A feedback-based digital DC offset correction scheme provides different adjustment levels for a plurality of discrete gain states and the analog DC offset correction scheme operates in different cancellation modes dependent on a frame structure. A digital DC offset correction scheme collects DC offset control information and provides adjustment levels. In addition, a negative-feedback based switchable high pass filter has a plurality modes of operation, where one mode of operation includes an all-pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.