Transmit circuit, method for adjusting a bias of a power amplifier and method for adapting the provision of a bias information
US8761698B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Nov 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transmit circuit includes a power amplifier configured to amplify an RF input signal to obtain an RF output signal, and an antenna tuner configured to transform an antenna impedance to an impedance at an input of the antenna tuner, wherein the input of the antenna tuner is coupled to an output of the power amplifier. The transmit circuit further includes a bias controller configured to control a bias of the power amplifier, wherein the bias controller is configured to provide a bias control signal to adjust the bias of the power amplifier based on a determination of a measure of a load impedance provided to the power amplifier by the antenna tuner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.