Patent ID: 7167045

Claim:
A system formed on a monolithic substrate, comprising: a variable gain amplifier (VGA) responsive to an input signal and a gain control signal for controlling a gain of the VGA; a power amplifier responsive to the VGA; a power detector responsive to the power amplifier, wherein the power detector detects an output power level of the power amplifier; a comparator responsive to the power detector, wherein the comparator compares the output power level of the power amplifier with a first predetermined value to generate the gain control signal; an accumulator responsive to the comparator, wherein an output of the accumulator is offset by a first gain offset value, and wherein the first predetermined value and the first gain offset value are associated with a first output power level of the power amplifier; a temperature sensor, wherein the gain control signal is further offset by a temperature offset value associated with a temperature of the integrated circuit sensed by the temperature sensor, wherein the temperature offset value alters the gain control signal to compensate the gain of the VGA for variations in the temperature of the integrated circuit; and conversion circuitry responsive to the temperature sensor, wherein the conversion circuitry converts the temperature sensed by the temperature sensor into the temperature offset value, and wherein to change the output power level of the power amplifier from the first output power level to a second output power level, the first predetermined reference value and the first gain offset value are changed substantially simultaneously to a second predetermined reference value and a second gain offset value, respectively, associated with the second output power level.