Radio frequency signal gain control
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United States of America Patent
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Dec 8, 2015
Grant Date -
Apr 17, 2014
app pub date -
Oct 2, 2013
filing date -
Nov 10, 2011
priority date (Note) -
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Abstract
An RF receiver is described comprising a common gate common source LNA with a variable resistor in the source of the common gate transistor, a variable resistor in the source of the common source transistor, and a variable resistor in the RF input. A Smart Gain Control varies the resistance in the resistors to produce linear amplification in the LNA while maintaining input matching. Further, a broad dynamic range RSSI is described that implements a feedback control loop to maintain signal power within a sensitivity range of the power detector in the RSSI.
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