Transmit circuit, method for adjusting a bias of a power amplifier and method for adapting the provision of a bias information
US9124316B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2014 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | May 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transmit circuit includes an envelope tracker configured to determine an envelope of a transmit signal and provide bias information based on the determined envelope of the transmit signal. The transmit circuit further includes a power amplifier configured to generate an RF output signal based on the transmit signal, a bias provider configured to provide a bias for the power amplifier based on the bias information, and an impedance determinator configured to determine a measure of a load impedance of a load coupled to an output of the power amplifier. The envelope tracker is configured to adapt the bias information based on the measure of the load impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.