Multi-state load switched power amplifier for polar modulation transmitter
US7183844B2 · kind B2 · utility
16Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2004 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Mar 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/387
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A polar modulation power amplifier circuit includes a control circuit (101) to determine and provide a load selection signal (127), wherein the load selection signal (127) is determined responsive to a requested power signal (119). A power amplifier (113) is responsive to a power control signal (141), for amplifying an RF signal (139) to produce an amplified signal (145), having an output power level. A variable impedance matching circuit (117) is responsive to the load selection signal (127), to adjust a relationship between the control level and the output power level, to produce a range-adjusted amplified signal (147).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.