Low noise amplifier
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United States of America Patent
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Aug 14, 2012
Grant Date -
May 5, 2011
app pub date -
Mar 25, 2009
filing date -
Apr 18, 2008
priority date (Note) -
Expired
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Abstract
A wideband tuneable low noise amplifier that is capable of receiving signals over a wide range of frequencies, providing tuneable filtering to remove out of band interferer signals, and providing variable gain for a wide range of frequencies. To accommodate variable gain, the low noise amplifier has an amplifier stage comprising two gain stages, and the relationship between the gain stages is controlled responsive to changes in the voltage gain of an input stage. Linearity monitoring combined with Q-enhance may be employed to increase performance at low signal levels.
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