Schmitt trigger is shown in the figure. The upper and lower

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Schmitt trigger is shown in the figure. The upper and lower threshold voltage are respectively

1. 2 V, – 4 V
2. 2 V, – 2 V
3. 4 V, – 4 V
4. 4 V, – 2 V

Correct Option: C

Upper crossover voltage when V₀ = + 10 V At upper threshold point

5

(10) =

5

(2) +

20

V_TL

5 + 20

10 + 20

10 + 20

⇒	2	V_TH = 2 -	2	⇒ V_TH = 2V
	3		3

Lower crossover voltage when V₀ = – 10 V

5

(-10) =

10

(2) =

20

V_TL

5 + 20

10 + 20

10 + 20

⇒ V_TL = – 4V