What is a Zero Crossing Detector?
It is a circuit that compares the applied input voltage at one input terminal of an op-amp with a reference voltage = 0 at another input terminal of an op-amp. Because it uses reference voltage =0 that’s why it is called Zero Crossing Detector. The output of the Zero Crossing Detector is a square wave. So it is also known as the Square wave Generator.
Material Required For Making Zero Crossing Detector: For making a Zero Crossing Detector We have required two or three Resistors, a bridge rectifier, and an optocoupler.
Zero Crossing Detector
A voltage comparator circuit whose output changes concerning the input signal which is crossing the zero of the reference voltage level that’s why it is called a Zero Crossing Detector. These circuits are commonly known as switching circuits the output of these circuits lies between positive and negative saturation voltage levels. The most commonly used circuits are the Schmitt trigger, Astable, and Monostable Multivibrators.
Table of Content
- What is a Zero Crossing Detector?
- Types
- Inverting Zero Crossing Detector
- Non-Inverting Zero Crossing Detector
- Applications
- Advantages and Disadvantages
- Comparsion Between Comparator and Schmitt Trigger