Zero Crossing Detector Circuit Diagram

This is the simple Schmidt trigger zero crossing detector circuit diagram. This circuit has a 100 mV hysteresis which can be used in applications where very fast transition times are required at the output even though the signal is very slow. The hysteresis loop also reduces false triggering due to noise on the input. The waveforms show the trip points developed by the hysteresis loop.

Zero Crossing Detector Circuit Diagram