Patent ID: 7907920

Claim:
A transmitter for a wireless communications device, wherein the transmitter comprises: a power amplification block comprising: a pre-amplifier configured to amplify a transmission signal to produce a pre-amplified transmission signal; and a power amplifier coupled to the pre-amplifier and configured to amplify the pre-amplified transmission signal to produce an amplified transmission signal; a detector coupled to the output of the pre-amplifier and configured to provide a detected pre-amp output signal; and a power management block comprising: a switching regulator control block configured to generate a switching supply control signal by applying a switching control transfer function to the detected pre-amp output signal; and a switched mode power supply coupled to the switching regulator control block and configured to generate a supply voltage signal based on the switching supply control signal and provide the supply voltage signal to the power amplifier; wherein the switching control transfer function is derived based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive.