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?
A. Increasing input voltage
B. Use of positive feedback
C. Connect a compensating network
D. None of the mentioned
Answer:A
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?
A. Increasing input voltage B. Use of positive feedback C. Connect a compensating network D. None of the mentioned
Explanation: The drawback of zero crossing detectors can be in cured with the use of regenerative or positive feedback that causes the output to change faster and eliminate any false output transition due to noise signals at the input. 10. Name the comparator that helps to find unknown input.