Zero Crossing Detector¶

This element observes the input signal and supplies a short logic pulse if it crosses the zero line. The pulse width is one integration step size, so that it is not visible if the output time resolution is longer than the integration step size.

There are three detection modes:
Both Directions : Fires an output pulse if the input goes form negative to positive or from positive to negative.
Negative > Positive : Detects crossings only if the input goes from negative to positive.
Positive > Negative : Detects crossings only if the input goes from positive to negative.