Method and apparatus for a cartesian error feedback circuit to correct distortion within a power amplifier
US7689180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Sep 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/57
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining baseband error signals with the appropriate phase shift with baseband input signals, the baseband error signals generated by subtractively combining delayed fed-forward portions of the baseband input signals with baseband converted portions of a fed-back amplified output signal, the amplified output signal being a distorted replica of combined up-converted baseband input signals. The baseband error signals being filtered prior to the combining function, and also providing inputs to a controller which adjusts active elements of the amplification and fed-back paths in order to minimize the distortion within the output of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.