Analog and electronic circuits

What does a comparator do?

  1. AIntegrates the input voltage over time
  2. BCompares two input voltages and outputs the result as a binary value (high or low)
  3. COutputs a voltage proportional to the input voltage
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Answer: B. Compares two input voltages and outputs the result as a binary value (high or low)

A comparator decides which of two input voltages is larger and outputs either high or low. It is used in AD converters, voltage monitors and similar circuits. Hysteresis is sometimes added to prevent the output from chattering due to noise.

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