Patent ID: 7642850

Claim:
An RF amplifier system incorporating feedforward linearization, comprising: a digital multiplexer configured for receiving digital data s(t) from a digital waveform source and for generating first and second instances of said digital data; first converting means coupled to said digital multiplexer for converting said first instance of said digital data to analog magnitude and phase signals defining said analog signal; an RF amplifier coupled to said first converting means and responsive to said magnitude and phase signals for generating a distorted RF output signal modulated by at least one of said magnitude and phase signals; second converting means configured for receiving said second instance of said digital data from said digital multiplexer and converting said second instance of said digital data to an analog RF reference signal; a feedforward linearization circuit for reducing a distortion of said RF amplifier, said feedforward linearization circuit comprising a differential amplifier arranged for generating an error signal representing a difference between said distorted RF output signal and said analog RF reference signal; and combining means for combining said error signal with said distorted RF output signal for removing a distorted portion of said distorted RF output signal.