Patent ID: 8538357

Claim:
A power amplification device for a radio frequency (RF) transmission signal, comprising: a voltage regulation circuit having a voltage adjustment gain and being configured to: receive a voltage control signal and a supply voltage; generate a regulated voltage having a regulated voltage level from the supply voltage and being responsive to a change in a voltage control signal level of the voltage control signal so as to adjust the regulated voltage level of the regulated voltage in accordance with the change in the voltage control signal level and the voltage adjustment gain; reduce the voltage adjustment gain when the regulated voltage level of the regulated voltage reaches a threshold voltage level; and respond to a band-select signal so that the threshold voltage level is higher when the band-select signal indicates a first transmission frequency band for transmission of the RF transmission signal and the threshold voltage level is lower when the band-select signal indicates a second transmission frequency band that is higher than the first transmission frequency band for transmission of the RF transmission signal; and a power amplification circuit operable to amplify the RF transmission signal in accordance with an amplification gain wherein the power amplification circuit is operably associated with the voltage regulation circuit such that the amplification gain of the power amplification circuit is adjusted by the regulated voltage level of the regulated voltage.