Figure shows a schmitt trigger circuit and the corrsponding hysteresis characteristics. The value of $V_{T H} - V_{T L}$ is _______ volts.

12

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Solution

The correct option is A 12

$V_{0} will be either at + V_{s a t} o r V_{s a t}$

Voltage $V_{1}$ at node 1,

$V_{1} = \frac{2 V_{0} + 4 V_{1}}{6} = \frac{V_{0}}{3} + \frac{2}{3} V_{i}$

As, $V_{1} = 0$

$T h e n V_{0} = - 2 V_{i}$

$V_{i} = \frac{- V_{0}}{2}$

So for $V_{0} = + V_{s a t}$

$V_{i} = V_{T L} = \frac{- 12}{2} = - 6 V$

and for $V_{0} = - V_{s a t}$

$V_{0} = V_{T H} = \frac{12}{2} = 6 V$

$∴ V_{T H} - V_{T L} = 6 - (- 6) = 12 V$

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Similar questions

The input-output characteristic of a Schmitt trigger is shown in the figure below: The noise margin of the Schmitt trigger is equal to

\pm 12 V,

V_{H}

V_{R} = 3 V, t h e n V_{UTP}

A_{V} = \frac{V_{o}}{V_{i}}

(Assume V_{T h} = 25 V)

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