Linearization using parallel cancellation in linear power amplifier
US6242979A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3276
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A predistortion linear power amplifier and method employs parallel predistortion cancellation. In one embodiment the predistortion linear power amplifier (200) utilizes a signal splitter (202) to split an input carrier signal. A first amplifier, such as a main power amplifier (206) in a first path (214), receives the first split carrier signal (216). A signal predistortor (210) in a second path (218) is operatively coupled to receive a second split carrier signal (220) and to output a predistorted carrier signal (226). A second amplifier, such as a linear power amplifier (212) serially coupled with the signal predistortor (210) in the second path, amplifies the predistorted carrier signal (226). A signal combiner (208) operatively combines the output from the first amplifier and the output from the second amplifier to provide an amplified carrier output signal (230) from which nonlinear distortion has been substantially cancelled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.