Patent ID: 8811921

Claim:
A radio frequency (RF) communications system comprising: power amplifier (PA) control circuitry adapted to: identify a selected communications mode of the RF communications system and a target output power from RF PA circuitry; select a PA bias level of a first driver stage of the RF PA circuitry and a PA bias level of a first final stage of the RF PA circuitry based on the selected communications mode and the target output power; and PA bias circuitry adapted to: establish the PA bias level of the first driver stage based on the selected PA bias level of the first driver stage by providing a first driver bias signal to the first driver stage via driver stage current digital-to-analog converter (IDAC) circuitry; and establish the PA bias level of the first final stage based on the selected PA bias level of the first final stage by providing a first final bias signal to the first final stage via final stage IDAC circuitry, wherein the first driver stage and the first final stage are independently biased.