Patent ID: 7433658

Claim:
A system for controlling true output power of a transmitter, comprising: a voltage detector in communication with a power amplifier of the transmitter for detecting an output voltage of the power amplifier, wherein the voltage detector generates a voltage signal that is proportional to the output voltage of the power amplifier, wherein the voltage detector comprises: a voltage scaler for scaling the output voltage of the power amplifier; and a voltage scaling ratio controller for controlling a voltage scaling ratio of the voltage scaler to maintain the voltage signal within a predetermined voltage range based on a plurality of stored target output power levels and corresponding voltage scaling ratios; a current detector in communication with the power amplifier for detecting an output current of the power amplifier, wherein the current detector generates a current signal that is proportional to the output current of the power amplifier, wherein the current detector comprises: a current mirror for mirroring the output current of the power amplifier, wherein the mirrored output current is scaled using a predetermined current scaling ratio; a power detector in communication with the voltage detector and the current detector for detecting a true output power delivered by the power amplifier, wherein the power detector comprises a multiplier for multiplying the current signal and the voltage signal to generate a power signal, wherein the power signal is proportional to the true output power delivered by the power amplifier; and a power controller in communication with the power detector and the power amplifier for controlling the power amplifier to regulate the true output power delivered by the power amplifier based on the power signal, wherein the power controller generates a control signal associated with the power signal, and wherein the control signal is configured to vary the true output power delivered by the power amplifier, wherein the power controller comprises: a comparator for comparing the power signal with at least one predetermined threshold, wherein the power controller generates the control signal based upon the comparison of the power signal with the at least one predetermined threshold.