Termination circuit based linear high efficiency radio frequency amplifier
US8072271B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2009 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Oct 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to RF power amplifier circuitry that may include a source termination circuit, a load termination circuit, or both used in an unconventional manner to shape amplitude-based amplitude modulation (AM-AM) distortion, amplitude-based phase modulation (AM-PM) distortion, or both to extend a linear operating range of the RF power amplifier circuitry. Conventional RF power amplifier circuitry may operate as a Class F RF power amplifier, which may use termination circuits to create impedance valleys at even harmonics of an RF carrier frequency to improve a saturated efficiency of the RF power amplifier circuitry. However, the termination circuits of the present disclosure may create impedance valleys that are not at even harmonics of an RF carrier frequency to shape amplitude-based distortion, thereby extending a linear operating range of the RF power amplifier circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.