Explanation: Sometimes it is necessary to find the instant at which an unknown input is between two threshold levels. This can be achieved by a circuit called window detector. 11. Find the instance at which the input can be fed to the op-amp in a three level comparator with LED indicator.
A. When Green LED glow
B. When Yellow LED glow
C. When Red LED glow
D. All of the mentioned
Answer:A
Explanation: Sometimes it is necessary to find the instant at which an unknown input is between two threshold levels. This can be achieved by a circuit called window detector. 11. Find the instance at which the input can be fed to the op-amp in a three level comparator with LED indicator.
A. When Green LED glow B. When Yellow LED glow C. When Red LED glow D. All of the mentioned
Explanation: The input can be fed to the op-amp when the green LED glows, which is considered to be safe input that is when the input voltage is between 3v and 6v. 12. Find the output voltage at the point V2 from the given circuit.