Why the ultra-low noise is so important in RF design?

Document created by analog-archivist Employee on Feb 23, 2016
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Why the ultra-low noise is so important in RF design?

 

Noise coupled into the mixer core can create unwanted products that degrade
linearity and dynamic range. This is especially critical for a quadrature
demodulator because the low- frequency mixing products fall within the band of
interest. Similarly, power-supply noise can degrade the phase noise of the
PLL/VCO.

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