Dual power amplifier linearizer
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 5, 2015
app pub date -
Feb 27, 2014
filing date -
Sep 4, 2013
priority date (Note) -
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Abstract
A circuit in a transmitter with multiple power amplifiers includes multiple individual linearizer circuits each receiving a corresponding input signal and each providing a conditioned input signal to a corresponding power amplifier. The linearizer circuit each include: (a) a pre-distortion circuit receiving (i) the corresponding input signal and (ii) the output signal of a corresponding power amplifier, and providing a pre-distortion signal; (b) a cancelation circuit receiving an interfering signal and providing a cancelation signal; and (c) a combination circuit that combines the cancelation signal and the pre-distortion signal to provide a conditioned input signal to the corresponding power amplifier.
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