Patent ID: 8571498

Claim:
A power management system for a radio frequency (RF) power amplifier (PA) load, comprising: a first switching power supply adapted to provide a relatively constant DC voltage to the RF PA load, the first switching power supply having an output terminal for coupling a first output filter to the first switching power supply; an electronic switch for selectively coupling the first output filter between the first switching power supply and the RF PA load; a second switching power supply adapted to provide a dynamic DC voltage to the RF PA load, wherein the dynamic DC voltage is amplitude modulated in synchronization with the amplitude of a transmit signal that is to be amplified by the RF PA load, the second switching power supply having an output terminal for coupling a second output filter between the second switching power supply and the RF PA load; and a control system that is adapted to close the electronic switch to supply the relatively constant DC voltage in addition to the dynamic DC voltage to the RF PA load in a first mode and to open the electronic switch wherein the relatively constant DC voltage is not supplied to the RF PA load in a second mode.