Patent ID: 7961812

Claim:
A radio frequency (RF) polar transmitter, comprising: a digital processor coupled, during a measurement mode, to receive an input complex modulated digital signal including an amplitude-modulated digital signal and a phase-modulated digital signal and a feedback signal including a amplitude-modulated feedback signal and a phase-modulated feedback signal and operable to compare the input complex modulated digital signal to the feedback signal to determine an error signal indicative of a difference between the input complex modulated digital signal and the feedback signal and to store the error signal; a Digital-to-Analog Converter (DAC) for converting the amplitude-modulated digital signal from digital to analog to produce an amplitude-modulated analog signal; a translational loop for producing a phase-modulated RF signal from the phase-modulated digital signal; a power amplifier for producing a modulated RF signal from the phase-modulated RF signal and the amplitude-modulated analog signal; and a feedback loop coupled to receive the modulated RF signal from the power amplifier and operable to produce the feedback signal from the modulated RF signal.