Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment
US10382147B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Jan 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21106
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment are provided. In certain configurations, a method of calibrating a power amplifier system includes amplifying a radio frequency signal from a transceiver using a power amplifier and generating a supply voltage of the power amplifier using an envelope tracker, including generating a scaled envelope signal based on a power control level signal and an envelope signal, and shaping the scaled envelope signal using a shaping table generated at a target gain compression. The method further includes changing a scaling of the scaled envelope signal using a calibration module, monitoring an output of the power amplifier to determine an amount of scaling of the scaled envelope signal at which a detected gain compression of the power amplifier corresponds to the target gain compression of the shaping table, and calibrating the power amplifier system based on the determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.