Circuits and methods for biasing a power amplifier
US9419561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Apr 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure includes circuits and methods for power amplifiers. In one embodiment, a main amplifier stage and peaking amplifier stage of a power amplifier receive a modulated supply voltage. The peaking amplifier stage is biased dynamically to adjust the bias of peaking stage to compensate for changes in the power supply voltage. A bias voltage may be increased as the supply voltage on the peaking stage decreases, and the bias voltage may be decreased as the supply voltage on the peaking stage increases. Accordingly, bias characteristics of the peaking stage are maintained across supply voltage variations, and the efficiency of the power amplifier is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.