A SIGNAL PROCESSING STAGE FOR AN AMPLIFIER

摘要

A signal processing stage for an amplifier comprises an input arranged to receive a modulated input signal (Input Signal) and a converter (40) for splitting the modulated input signal (Input Signal) into a magnitude signal component (Signal Magnitude) and a phase signal component (Signal Phase). A detector (46) detects a time (Tc) when the magnitude signal has a magnitude less than a threshold level (M). A phase modifier (44) modifies the phase signal by reducing a maximum rate of change of the phase signal component while the magnitude signal is less than the threshold level. A combiner (48) combines a magnitude signal derived from the magnitude signal with the modified phase signal to provide a modulated output signal for amplification.