Linear row array integrated power combiner for RF power amplifiers
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United States of America Patent
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Nov 7, 2017
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N/A
app pub date -
Nov 26, 2015
filing date -
Sep 23, 2012
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Abstract
A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 wireless local area network (WLAN), third generation (3G) and fourth generation (4G) cellular standards, BLUETOOTH™, ZIGBEE™, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard Complementary metal-oxide-semiconductor (CMOS) processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers.
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