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ADC Input Noise: The Good,The
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ADC Input Noise: The Good,The Bad, and The Ugly.Is No Noise Good Noise?
Introduction
All analog-to-digital converters (ADCs) have a certain amount of
input-referred noise—modeled as a noise source connected in series
with the input of a noise-free ADC. Input-referred noise is not
to be confused with quantization noise, which is only of interest
when an ADC is processing time-varying signals. In most cases,
less input noise is better; however, there are some instances where
input noise can actually be helpful in achieving higher resolution.
If this doesn’t seem to make sense right now, read on to find out
how some noise can be good noise.
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