| 摘要 |
A wideband linear amplification system (208) amplifies an input signal (301) to produce an amplified output signal (361). An envelope detector (302) determines an envelope detector signal (303) based on the input signal. An amplifier bias controller (304) produces multiple control signals (305) based on the envelope detector signal. A predistortion signal loop (310) modifies the input signal, using a companion amplifier stage (342), based on a first control signal of the multiple control signals to produce a predistorted input signal (331) that includes a distortion component introduced by the companion amplifier stage. A main amplifier stage (320) amplifies the predistorted input signal to produce the amplified output signal based on a second control signal of the multiple control signals, wherein the distortion component of the predistorted input signal at least partially cancels a distortion component introduced to the amplified output signal by the main amplifier stage.
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