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A comparator is thus a 1 bit analog to digital converter. If the input to the non-inverting input is greater than that to the inverting input, the output is a logical 1. If the input to the non-inverting input is less than that to the inverting input, the output is a logical 0. We thus have the key element for asking "is the signal above or below a threshold level?" We will use comparators in EVERY analog-to-digital converter to detect analog thresholds.

   
 

 
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