Question

Which of the following converts an analog signal into a square wave?

• A. Monostable multivibrator
• B. Schmitt trigger
• C. Multiplexer
• D. Comparator

Hint:

A Schmitt trigger uses \[ \boxed{\text{Positive feedback (hysteresis)}} \] to produce a clean square-wave output from an analog input.

Answer 1

The Correct Option is B

Step 1: Recall the function of a Schmitt trigger. A Schmitt trigger is a regenerative comparator with hysteresis.

Step 2: Identify its application. It converts slowly varying or noisy analog input signals into clean digital square-wave outputs. Hence, \[ \boxed{\text{Schmitt trigger}} \] is the correct answer. Therefore, \[ \boxed{(B)} \] is the correct answer.