|Created||April 13, 2012|
|Last modified||April 15, 2012|
|Tags||behavioural-sources convergence improving-convergence ramped-sine-source schmitt-trigger|
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.
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