Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 4 (Q.No. 5)
5.
Consider the Schmitt trigger circuit shown below. A triangular wave which goes from - 12 V to 12 V is applied to the inverting input of the op-amp. Assume that the output of the op-amp moves from +15 V to -15 V. The voltage at the non-inverting switches between
Answer: Option
Explanation:
V0 is switching between + 15 to - 150
Thus voltage at non-inverting input switches between
, 7.5 to - 7.5 .
Discussion:
2 comments Page 1 of 1.
Milan sharma said:
8 years ago
It should be -5 to 5 because the top resistor also affects the beta and beta will be 10/(30) i.e 1/3.
Sree said:
9 years ago
If the answer is 7.5. Then what is the need for the top resistor (10k)?
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