DC offset and 1/f noise compensation of a direct conversion receiver
US7194243B2 · kind B2 · utility
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20References
2Claims
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Key dates
| Filing date | Apr 2, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/302
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a direct conversion receiver with zero-frequency intermediate frequency (IF) signal, the DC offset and 1/f noise of the IF signal is compensated by means of double-sampling. The first period of the doubling-sampling is a calibration phase, which stores the DC offset and the 1/f noise. The second period is a signal flow phase during which the stored DC offset and 1/f noise is connected in opposition with the IF signal to cancel the DC offset and 1/f noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.