Reduced power amplifier load impact for open loop envelope tracking
US9362868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2013 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Mar 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/555
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for implementing envelope tracking (ET), the method comprising switching from a receiver (Rx) radio frequency (RF) path to a supply sensing path during factory calibration, sensing the power amplifier (PA)'s supply voltage via the supply sensing path, comparing the PA's supply voltage to a corresponding reference supply voltage, determining the difference between the PA's supply voltage and the corresponding reference supply voltage, and updating one or more parameters used to perform a PA load pre-distortion during factory calibration, wherein the PA load pre-distortion is used to match the PA's supply voltage to the corresponding reference supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.