Patent ID: 8335250

Claim:
A method of processing a baseband signal, comprising: amplifying a first pulse width modulation radio frequency signal having a negligible peak-to-peak amplitude when a baseband signal power is below a first threshold level, a first non-negligible peak-to-peak amplitude when the baseband signal power is between the first threshold level and a second threshold level and a second, larger non-negligible peak-to-peak amplitude when the baseband signal power is at or above the second threshold level; amplifying a second pulse width modulation radio frequency signal having a negligible peak-to-peak amplitude when the baseband signal power is below the second threshold level and a non-negligible peak-to-peak amplitude approximately equal to the second non-negligible peak-to-peak amplitude of the first pulse width modulation radio frequency signal when the baseband signal power is at or above the second threshold level; and constructively combining the amplified signals to form a third pulse width modulation radio frequency signal having a plurality of non-negligible peak-to-peak amplitude levels each corresponding to a different baseband signal power level.