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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.

Overview Structured Data Issues Contributors

Is a

Patent

Patent attributes

Current Assignee

Rfaxis, Inc.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

81755410

Patent Inventor Names

Oleksandr Gorbachov0

Date of Patent

May 8, 2012

Patent Application Number

124122260

Date Filed

March 26, 2009

Patent Primary Examiner

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Dean O Takaoka

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.