For the comparator circuit shown in figur e forward diode

For the comparator circuit shown in figur e forward diode voltage drop is V_y = 0.7 V and reverse Zener diode voltage is 5.6 V. If hysteresis width is 1 V, then value of R₂ is ____________kΩ

V_H = 5.6 + 0.7 = 6.3 V, V_L = – 5.6 – 0.7 = – 6.3 V
Let 1kΩ = R₁,

∴ V_TH = -		R₁		V_L
		R₂

and V_TL = -		R₁		V_H
		R₂

∴ V_TH - V_TL = 1 = -	R¹	(V_L - V_H)
	R²

⇒ 1 =	1k	(2)(-6.3)
	R²

⇒ R_T = 12.6 kΩ