Patent ID: 8829920

Claim:
A signal amplification circuit comprising: a first signal processor receiving a multi-tone input signal having a first tone at a fundamental frequency and a first drive power and further having additional tones at additional frequencies different from said fundamental frequency, said first signal processor filtering said multi-tone input signal in order to output two discrete signals, said two discrete signals comprising: a first signal having said first tone at said fundamental frequency and with said first drive power; and, a second signal having said additional tones at said additional frequencies; a second signal processor amplifying said first signal in order to output a third signal having said first tone at said fundamental frequency and with a second drive power that is higher than said first drive power; a third signal processor filtering said third signal in order to output a fourth signal having said first tone at said fundamental frequency and with said second drive power, said filtering of said third signal terminating harmonics added to said third signal by said second signal processor; and a fourth signal processor combining said second signal and said fourth signal in order to output a multi-tone output signal, said multi-tone output signal having said first tone at said fundamental frequency and with said second drive power and further having said additional tones at said additional frequencies.