Applications of Zero Crossing Detector

Some of the Applications of Zero Crossing Detector

  • It is mainly used for switching purpose in electronics circuits and in phase locked loop.
  • It is used in frequency counters.
  • It is used as phase meter for measuring the phase angles between two voltages applied at its terminals.


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

Similar Reads

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....

Types of Zero Crossing Detector

There are Two Types of Zero Crossing Detectors :...

Inverting Zero Crossing Detector

In the inverting zero crossing detector the input voltage is applied at the negative terminal of the op-amp and reference voltage = 0 is applied at the positive node of the op-amp. In the inverting zero crossing detector output of the given circuit goes into negative saturation when the applied input voltage is positive and output goes to positive when input voltage is negative, the circuit diagram of inverting zero crossing detector is given below....

Non-Inverting Zero Crossing Detector

In non – inverting Zero Crossing Detector the input voltage Vin is applied at the positive node of the op-amp and the reference voltage that is zero is applied at the negative node of the op-amp. In the non inverting zero crossing detector output of the given circuit goes into positive saturation when the applied input voltage is positive and output goes to negative when input voltage is negative, the circuit diagram of non inverting zero crossing detector is given below....

Applications of Zero Crossing Detector

Some of the Applications of Zero Crossing Detector...

Advantages and Disadvantages of Zero Crossing Detector

Some of the Advantages and Disadvantages of Zero Crossing Detector are given Below...

Comparison Between Comparator and Schmitt Trigger

PARAMETERS COMPARATOR SCHMITT TRIGGER 1. USE OF FEEDBACK No feedback op-amp used in open loop configuration. Uses positive feedback. 2. TRIGGER LEVELS At 0V or at V ref . 3. OUTPUT VOLTAGE +V sat or -V sat +V sat or -V sat. 4. HYSTERESIS 0V...

Conclusion

After all we can say that it is working like a COMPARATOR which is compare when the Vin is low or high than 0volt(Reference Voltage). it is very useful in the operation of circuit where the AC voltage is used, although some time it can not switch back quickly from one saturation to another. it is also very useful for switching purpose and in phase locked loop....

FAQs on Zero Crossing Detector

What is Zero Crossing Detector ?...