Schmitt trigger hysteresis calculation: Given VT+ = 2.0 V and VT− = 1.2 V, compute the hysteresis voltage (width) of the Schmitt trigger.

Introduction / Context:
Hysteresis in a Schmitt trigger defines the voltage band that prevents chatter by requiring a different threshold for rising versus falling transitions. This problem is a straightforward computation.

Given Data / Assumptions:

• Rising threshold VT+ = 2.0 V.
• Falling threshold VT− = 1.2 V.
• Hysteresis is the absolute difference between thresholds.

Concept / Approach:
The hysteresis width is VT+ − VT−.

Step-by-Step Solution:

Verification / Alternative check:
Check signs: thresholds are ordered VT+ > VT−, so difference is positive.

Why Other Options Are Wrong:

• 0.4 volt / 0.6 volt: Underestimates the difference.
• 1.2 volts: Confuses with the lower threshold magnitude.

Common Pitfalls:
Adding thresholds instead of subtracting, or using an average rather than the difference.

Final Answer:
0.8 volt