Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal
US6696866B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Jul 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An envelope tracking amplification system that includes an envelope tracking power supply (ETPS) amplifies a radio frequency (RF) signal to produce a linearized amplified signal. The envelope tracking amplification system samples the RF signal to produce a sampled RF signal. The ETPS produces a control signal based on an instantaneous magnitude of the sampled RF signal and further based on an average magnitude of the sampled RF signal, produces multiple supply voltages, and, based on the control signal, couples a supply voltage of the multiple supply voltages to an output of the EPTS to produce an output supply voltage. The envelope tracking amplification system then amplifies the RF signal based on the output supply voltage to produce a highly linear amplified signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.