lna

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Issue:

Science

 

Written by:

Edward S

 

Date added:

November 26, 2016

 

Level:

College

 

Grade:

A

 

No of pages / words:

1 / 209

 

Was viewed:

7299 times

 

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Essay content:

Biasing is done by large resistors, because energy efficiency is not needed, and a large resistor prevents leakage of the weak signal out of the signal path or noise into the signal path.
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It is a key component, which is placed at the front-end of a radio receiver circuit. Per Friis' formula, the overall noise figure of the receiver front-end is dominated by the first few stages. Using an LNA, the noise of all the subsequent stages is reduced by the gain of the LNA and the noise of the LNA is injected directly into the received signal...
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