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US 2019/0379339 A1Published application
Doherty amplifier
AssigneeSkyworks Solutions, Inc.
InventorsKenneth Sean Ozard, Anthony Trujillo
Life of this patent
Estimating the term…
Abstract
A multistage linear power amplifier receiving an input signal. The multistage linear power amplifier comprises a plurality of Class-AB amplifiers connected in a cascade configuration. The plurality of Class-AB amplifiers amplifies the input signal to generate an amplified input signal. At least one of the plurality of Class-AB amplifiers is biased such that the multistage linear power amplifier emulates a Class-C amplifier.
Claims21
1-19. (canceled)
A multistage power amplifier comprising:
- a plurality of amplifiers biased within a bias range associated with an amplifier of a first class, at least one of the plurality of amplifiers biased within the bias range is biased within a first portion of the bias range and at least one other of the plurality of amplifiers biased within the bias range is biased within a second portion of the bias range that differs from the first portion of the bias range such that the multistage power amplifier mimics a behavior of an amplifier of a second class while each of the plurality of power amplifiers is biased within the bias range associated with the amplifier of the first class.
A Doherty power amplifier comprising:
- a first multistage power amplifier including a first plurality of amplifiers of a first class, the first multistage power amplifier configured to amplify a first signal;
- and
- a second multistage power amplifier configured to amplify a second signal that is a phase shifted version of the first signal, the second multistage power amplifier including a second plurality of amplifiers biased within a bias range associated with an amplifier of the first class, at least one of the second plurality of amplifiers biased within a first portion of the bias range and at least one other of the second plurality of amplifiers biased within a second portion of the bias range that differs from the first portion of the bias range such that the second multistage power amplifier mimics a behavior of an amplifier of a second class while each of the second plurality of power amplifiers is biased within the bias range associated with the first class of amplifier.
Dependencies are inferred from the claim text.