An amplifier in which the input signal is delayed to allow time for the power supply to adjust to a level which minimises power loss

摘要

An amplifier in which a linear amplifier output stage 14 is supplied with a variable voltage from a switched-mode power supply 19 to minimise power loss in the output stage. The input signal is sampled and digitally delayed 8 before being input to the output stage in order to allow the low-bandwidth switched-mode power supply time to provide the appropriate supply voltage to the amplifier output stage compatible with acceptable distortion and minimum power dissipation in the amplifier.