Patent ID: 7787839

Claim:
A radio frequency (RF) front-end comprises: a power amplifier module coupled to amplify an outbound RF signal in accordance with a control signal to produce an amplified outbound RF signal; and power amplifier control module coupled to generate the control signal based on at least one of forward power of the amplified outbound RF signal and reflected power of the amplified outbound RF signal, the power amplifier control module including: a first rectifying circuit coupled to rectify the amplified outbound RF signal to produce a rectified forward outbound RF signal, wherein the rectified forward outbound RF signal is representative of the forward power; a second rectifying circuit coupled to rectify the amplified outbound RF signal to produce a rectified reflected outbound RF signal, wherein the rectified reflected outbound RF signal is representative of the reflected power; a first comparison module coupled to compare the rectified reflected outbound RF signal with a reflected power threshold and to output an over power indication when the rectified reflected outbound RF signal compares unfavorably with the reflected power threshold; a first control circuit to generate the control signal as a bias adjust signal based on an interpretation of the rectified forward outbound RF signal; and a second control circuit to generate the control signal as a power down signal for the power amplifier module based on the over power indication.