Patent ID: 9571048
Date: 2017-02-14
CPC Classifications: H03F

Claim:
1. A differential power amplifier comprising: an envelope tracking power supply configured to provide an envelope power supply signal to the differential power amplifier; an input stage having at least one input and at least one output, the input stage configured to provide a differential signal having a first portion and a second portion, wherein the input stage comprises a transformer; a first output stage amplifier configured to receive the first portion of the differential signal at a first output stage input and provide a first amplified signal at a first output stage output; a second output stage amplifier configured to receive the second portion of the differential signal at a second output stage input and provide a second amplified signal at a second output stage output; and a first capacitance coupled to the envelope tracking power supply and to the at least one output of the input stage, wherein the envelope power supply signal provides power for amplification.