Systems and methods to adjust the bias of an amplifier
US8706064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2013 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Feb 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method improve amplifier efficiency of operation relative to that of an amplifying transistor with a fixed bias current. A power level representing a level of transmission power from an amplifier circuit and an indicator of amplifier circuit operation are provided. The indicator is at least one of channel, channel bandwidth, out-of band spectral requirements, spectral mask requirements, error vector magnitude, modulation rate, and modulation type. The amplifying transistor is biased with a bias current that is determined based at least in part on the power level and the indication where the bias current is different for channels at an edge of a channel band than for channels nearer a center of the channel band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.