Patent ID: 9231529
Filing Date: 2016-01-05
CPC Classification: H03F

Claim Text:
1. An amplifier comprising: an input amplifier stage operative to amplify an input communication signal and to provide (i) an amplified communication signal containing a scaled-up version of the input communication signal and a distortion component and (ii) an input feedforward signal containing a scaled-down version of the distortion component; and a plurality of switchable output amplifier stages, wherein each switchable output amplifier stage of the switchable output amplifier stages is operative to: (i) amplify the input feedforward signal to create an amplified feedforward signal and to combine the amplified feedforward signal with the amplified communication signal so as to at least partially cancel the distortion component on an output conductor; and (ii) activate and deactivate, via switching circuitry that is brought correspondingly into or out of conduction, the switchable output amplifier stage.