Patent ID: 8064851

Claim:
A radio-frequency (RF) transmitter compensated for bias-signal-induced distortion, said RF transmitter comprising: an RF amplifier having a variably biased operating point; a baseband communication signal source configured to supply a baseband communication signal; a bias signal generator having an input responsive to said baseband communication signal, said bias signal generator being configured to produce a bias signal for use in establishing said operating point, and said bias signal generator having an output coupled to said RF amplifier and configured to provide an analog form of said bias signal to said RF amplifier; a predistorter having an input coupled said bias signal generator and configured to receive a digital form of said bias signal, said predistorter being configured to produce a predistorted baseband communication signal; and an upconversion section having an input responsive to said predistorted baseband communication signal and an output coupled to said RF amplifier.