Comparator and Schmitt Trigger

Comparator

Measure the threshold voltages in the circuit below by changing [math]V_{in}[/math]

Input a sinusoidal voltage and sketch the input and output waveforms.

Schmitt Trigger

Determine the threshold levels for the Schmitt trigger circuit below

Input a sinusoidal voltage and sketch the input and output waveforms.

What is the impact of a noisy input signal on the output?