Linear envelope tracking RF power amplifier with adaptive analog signal processing
US6407634B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jun 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/34
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A linear envelope tracking radio frequency (RF) power amplifier having an adaptive analog signal processing circuit. The amplifier outputs a voltage which is sampled by the adaptive analog signal processing circuit. The adaptive analog signal processing circuit generates an error signal which varies the linearity of the power amplifier. In one embodiment, the error signal controls a modulator which in turn controls the supply voltage to the power amplifier. In another embodiment, the control signal varies a controller which in turn varies a load placed on the power amplifier. The load in turn varies in linearity of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.