Doherty input power splitter and linearization method
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United States of America Patent
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Oct 9, 2018
Grant Date -
Feb 1, 2018
app pub date -
Nov 17, 2016
filing date -
Jul 26, 2016
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Abstract
Embodiments of a Doherty amplifier device are provided, including a first amplifier stage having a first gain; a second amplifier stage having a second gain that is less than the first gain; and an input power splitter coupled to inputs of the first and second amplifier stages, wherein the input power splitter includes either an inductive element, a capacitive element, or both coupled between the inputs of the first and second amplifier stages, and a resistive element coupled to the input of the second amplifier stage, the input power splitter respectively delivers first and second power levels to inputs of the first and second amplifier stages, and the resistive element is configured to tune gain linearity of the Doherty amplifier device by increasing the second power level to be greater than the first power level, based on a ratio of the second gain to the first gain.
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