DC offset correction using dummy amplifier
US6816718B2 · kind B2 · utility
40Cited by
10References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2002 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jun 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a dummy low noise amplifier (LNA) and an associated resistive network. Prior to DC offset correction, the primary LNAs are deactivated and the antenna is decoupled from the receive path leading to the inputs of the primary LNAs. A resistance is selected to provide a load at the input of the dummy LNA, wherein the load emulates the input load resistance seen by the primary LNA, which will be used to receive the incoming signal. Thus, the output of the dummy LNA emulates the performance of the primary LNA used to receive the incoming signal to allow accurate DC offset correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.