Doherty power amplifiers with different operating biases
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United States of America Patent
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-
May 14, 2019
Grant Date -
Sep 13, 2018
app pub date -
Mar 6, 2018
filing date -
May 13, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Systems and methods related to linear load modulated power amplifiers. A power amplifier (PA) system can include a divider that splits a signal into two portions, a first portion directed to an attenuator that attenuates the first portion so that the first portion and the second portion have different powers and a second portion directed to a phase shift component that shifts a phase of the second portion so that the first portion and the second portion have different phases. The PA system can also include a Doherty amplifier circuit where a carrier amplifier amplifies the attenuated first portion and a peaking amplifier amplifies the phase-shifted second portion. The carrier amplifier includes a Class AB driver stage and a Class B output. The peaking amplifier includes a Class B driver stage a Class B output stage.
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