Patent ID: 6993087

Claim:
A transmitter structure comprising: a modulator comprising: a local oscillator configured to generate a carrier frequency; a low-frequency portion configured to determine the phase information content and the amplitude information content of an input signal, a high frequency RF portion configured to generate a modulated RE signal by modulating said carrier signal and a switching mode amplifier configured to amplify the modulated RF signal; and characterized by further comprising: the high frequency RF portion configured to generate a first modulated RF signal by modulating said carrier signal according to the phase information content as a first two-state signal and a second modulated RF signal by modulating said carrier signal according to the amplitude information content as a second two-state signal; the switching mode power amplifier further characterized by two parallel switching mode amplifiers connected to said modulator, each of said two parallel switching mode amplifiers amplifying a respective one of the first and second modulated RF signals; coupling means having its input connected to a respective output of said two parallel switching mode amplifiers for receiving and combining the amplified first and second modulated RF signals as a three-state signal for delivery to a load.