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US Patent 8175541 Radio frequency transceiver front end circuit

Patent 8175541 was granted and assigned to Rfaxis, Inc. on May, 2012 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee
Rfaxis, Inc.
Rfaxis, Inc.
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
81755410
Patent Inventor Names
Oleksandr Gorbachov0
Date of Patent
May 8, 2012
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Patent Application Number
124122260
Date Filed
March 26, 2009
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Patent Primary Examiner
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Dean O Takaoka
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Patent abstract

A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency.

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