Experiment 11 - Open-Collector Output II

The open-collector output gives you the possibility to operate the comparator circuit and the output circuit at different voltages...

In the circuit shown you operate the LED at the output at a voltage of 5 Volt. However, you operate the comparator circuit still at 5 Volt.

Circuit diagram of an open-collector comparator.

Open-collector circuit of a comparator. (Enlarge)

This results in many practical applications of a comparator circuit with an open-collector output. More on this later...

However, in the next experiment you revisit the LOW-state of the open-collector output...