Advanced load-switch circuit with zero phase rotation
US8437714B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2010 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Jul 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to the efficient transmission of voice and data signals using mobile terminals, and in particular to optimizing the power added efficiency (PAE) of a power amplifier (PA) by controlling the amplifier's load impedance over a range of radio frequency (RF) output power levels. A power amplifier having a first power level and at least a second power level is provided along with a first impedance matching network section with an output. A second impedance matching network section and at least a third impedance network section in communication with the output are selectably coupled to a load network by switches that are opened and close in response to various power levels of operation for the load switch circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.