Patent ID: 8401500

Claim:
Radio frequency (RF) communications circuitry comprising: control circuitry adapted to provide an output setpoint signal containing an output setpoint and select between a switching supply operating mode and a non-switching supply operating mode based on the output setpoint; and an RF power amplifier (PA) power supply adapted to receive the output setpoint signal and provide a power supply output signal and comprising: a direct current (DC)-to-DC converter adapted to, during the switching supply operating mode: receive a power supply input signal; and provide the power supply output signal to a first RF PA that is based on a DC-to DC conversion of the power supply input signal and the output setpoint; and a series pass circuit coupled across the DC-to-DC converter and adapted to, during the non-switching supply operating mode: receive the power supply input signal; and provide the power supply output signal to the first RF PA that is based on the power supply input signal and provided without DC-to-DC conversion.