Method and device for the reduction of the DC component of a signal transposed into baseband, in particular in a receiver of the direct conversion type
US7787853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Mar 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is for reducing a DC component of an input signal transposed into baseband and being generated by a first frequency transposition stage starting from an initial signal and from a transposition signal. The method includes amplifying the transposed input signal in a first amplifier. The first amplifier receives at a DC offset compensation input, a compensation signal extracted from an output signal of a second amplifier subjected to a compensation of a offset DC voltage of the second amplifier. The method also included alternating between receiving at an input of the second amplifier, a first auxiliary signal from an auto-transposition of a transposition signal in a second frequency transposition stage and a second auxiliary signal from a transposition of the initial signal in the second frequency transposition stage with the transposition signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.