Experiment 3 - The Non-Inverting Comparator

A comparator has two states at its output. Either the LED lights up or remains dark. This results in two "different" comparators...

In the circuit shown you recognize the circuit of the last experiment...

Circuit diagram non-inverting comparator.

Circuit non-inverting comparator. (Enlarge)

This results in the following state table and signal profile...

Voltages LED State Vin < VRef OFF LOW Vin > VRef ON HIGH States of a non-inverting comparator.

Signal profile of a non-inverting comparator.

In the next experiment, you interchange the inputs and obtain an inverting comparator...