In part 1 of this pair of articles, we ran SPICE noise simulations on a simple second order lowpass filter. We saw that there is something fundamental about the ‘hold’ that the filter’s capacitor ...
Sometimes things just don’t make sense! For instance, your RC filter or amplifier’s lowpass filter at the input of a delta-sigma ADC can produce a noisier digital output. Didn’t you design the filter ...
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