behavioural non-inverting schmitt trigger 01 PUBLIC

A non-inverting Schmitt trigger driven by a behavioural 5V peak to peak 1kHz cosine voltage source with an exponential startup from a 2.5V DC offset at a time constant of 250us, hard limited at 0.5V and 4.5V.

A simple demonstration of behavioural sources.

I1 implements a non-inverting Schmitt trigger with 0 - 5V output and voltage controlled high and low threshold levels.

V1 generates an input voltage of a 5V peak to peak 1kHz cosine voltage source with an exponential startup from a 2.5V DC offset at a time constant of 500us, hard limited at 0.5V and 4.5V.

A behavioural current source with a 1R load and a 1pF parallel capacitance is used in preference to a voltage source (with or without a series resistance/parallel capacitance to ground) because Norton equivalent circuits generally calculate faster and converge better than Thevenin equivalent sources. Band limiting behavioural sources also helps convergence.