Patent ID: 7768353

Claim:
A power-amplifier system, comprising: a driver amplifier that is operative to receive an input signal and generate an amplified input signal; a circuit for receiving a power control signal and generating a first control bias signal for adjusting an operation of the driver amplifier; a power amplifier that is operative to receive the amplified input signal and generate an output signal; and a feedback loop that receives the power control signal and generates a second control bias signal for adjusting an operation of the power amplifier, wherein the feedback loop comprises: a sensing block that detects a parameter associated with the output signal of the power amplifier, and a comparator that compares the detected parameter or a variation of the detected parameter to the received power control signal, wherein based upon the comparison, the comparator generates a compensation signal associated with the second control bias signal, wherein the sensing block comprises a current sensing block for detecting current associated with the output signal, wherein the detected current is converted to a detected voltage, and wherein the comparator compares the detected voltage to the power control signal in generating the compensation signal associated with the second control bias signal.