Explanation: In zero crossing detectors, the output waveform is always a square wave for the applied sinusoidal input signal. 8. What is the drawback in zero crossing detectors?
A. Low frequency signal and noise at output terminal
B. High frequency signal and noise at input terminal
C. Low frequency signal and noise at input terminal
D. High frequency signal and noise at output terminal
Answer:A
Explanation: In zero crossing detectors, the output waveform is always a square wave for the applied sinusoidal input signal. 8. What is the drawback in zero crossing detectors?
A. Low frequency signal and noise at output terminal B. High frequency signal and noise at input terminal C. Low frequency signal and noise at input terminal D. High frequency signal and noise at output terminal
Explanation: Due to low frequency signal, the output voltage may not switch quickly from one saturation voltage to other. The presence of noise can fluctuate the output between two saturation voltages. 9. State a method to overcome the drawback of zero crossing detectors?