Figure shown a Schmitt trigger circuit op-amp. The output

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Figure shown a Schmitt trigger circuit op-amp. The output V₀ is limited to + 10 V and – 5 V connecting suitably chosen Zener diodes at the output. The lower and upper trigger voltage are respectively:

1. – 1 V and 0.5 V
2. – 0.5 V and 1.0 V
3. – 1 V and – 0.5 V
4. 0.5 V and 1.0 V

Correct Option: A

V_UT = – (– V_sat).	R₂	= – (– 5).	1	= 0.5 V
	dR		10

V_LT = – V_sat.	R₂	= – 10.	1	= – 1 V
	dR		10