Patent ID: 8457570

Claim:
A system for the control of transmit power in a wireless communication device having a transmitter and a receiver, the system comprising: a power control reference circuit to generate a power control signal indicative of a desired transmit power based on a combination of an open-loop gain control and a closed-loop gain control both derived from the receiver; a variable gain transmitter amplifier having an amplifier input and an amplifier output and a variable gain control input to adjust variable gain; a transmit power control circuit to receive a digital error signal and generate a first control signal coupled to the control input to thereby control the variable gain and a second, different control signal to control a gain of another amplifier; a transmit power processor coupled to the amplifier output to detect a transmit power level, to generate a digital representation of an actual power from the transmit power level and to generate a feedback signal related thereto to adjust the variable gain, the feedback signal being a continuously linear representation of the actual power of the transmit power level, wherein the transmit power control circuit further comprises a transmitter linearizer for linearizing the error signal based on error differences between the desired transmit power and the actual transmit power level saved during coupling the amplifier output to the receiver during calibration of the transmitter; and an error circuit that generates the digital error signal that indicates a difference between the desired transmit power and the feedback signal, wherein the error signal is provided as an input to the transmit power control circuit.