High efficiency stage-switching CDMA power amplifier
US6653898B2 · kind B2 · utility
10Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2000 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0277
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is disclosed for use in a base station power amplifier a first and second amplifier stage for amplifying a received RF signal. A controller is provided that samples the incoming signal to determine its power level. If the signal power level is below a predetermined threshold, the controller directs the signal to the first amplifier stage which provides low power amplification. If the signal is above the threshold, the controller passes the signal to the second amplifier stage for high power amplification. Power efficiency is increased and DC power is reduced by switching off the unused amplifier stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.