CONFIGURABLE MULTIMODE MULTIBAND INTEGRATED DISTRIBUTED POWER AMPLIFIER
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Nov 13, 2014
filing date -
Sep 23, 2012
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Abstract
A novel and useful configurable radio frequency (RF) power amplifier (PA) and related front end module (FEM) circuit that enables manipulation of the operating point of the power amplifier resulting in configurability, multimode and multiband operating capability. The configurable PA also provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configurable power amplifier is made up of one or more configurable sub-amplifiers having each constructed to have several orders of freedom (i.e. biasing points). Each sub-amplifier and its combiner path include active and passive elements. Manipulating one or more biasing points of each sub-amplifier, and therefore of the aggregate power amplifier as well, achieves multimode and multiband operation. Biasing points include, for example, the gain and saturation point, frequency response, linearity level and EVM. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provides efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers.
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