Consider the following statements regarding the Schmitt trigger:
1. It is basically an astable multivibrator.
2. It is also called a regenerative comparator.
3. The output is a square wave for the sinusoidal input.
4. It is basically a comparator circuit with negative feedback.
Which of the above statements are correct?
1
1, 2 and 3 only
2
2, 3 and 4 only
3
2 and 3 only
4
1 and 4 only