Hybrid DC-offset reduction method and system for direct conversion receiver
US7933361B2 · kind B2 · utility
7Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2006 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Oct 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/061
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hybrid structure circuit for the cancellation of both Type-I and Type-II DC offsets. It comprises a static compensator in conjunction with a servo-loop feedback amplifier to suppress the undesired DC components present along the path of the base band after the direct conversion mixer. Two mixers are used to down convert a received RF signal directly to a base band signal with two components: in-phase and quadrature-phase. Both in-phase and quadrature-phase branches employ the same circuitry for DC offset cancellation. Miller effect is also utilized in the structure in order to implement the circuit on-chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.