Patent ID: 8081935

Claim:
A multiple-mode modulator comprising: a. a signal source configured to generate a radio frequency signal from a baseband signal; b. a power amplifier configured to receive a fixed input bias voltage, to operate in a linear region, a compressed region, and a saturation region, wherein the saturation region transitions between the linear region and the compressed region, and to output an amplified radio frequency signal; c. an amplitude modulation signal path coupled to the signal source and an input supply port of the power amplifier, wherein the amplitude modulation signal path is configured to generate an amplitude modulation signal according to the baseband signal, further wherein the amplitude modulation signal is configured to compensate for a power amplifier distortion; and d. a radio frequency signal path coupled to the signal source and an input radio frequency signal port of the power amplifier, wherein the radio frequency signal path is configured to provide a modulated radio frequency signal to the input radio frequency signal port of the power amplifier, wherein the modulated radio frequency signal includes a phase modulation signal and amplitude modulation of the radio frequency signal generated by the signal source.