Consider the inverting Schmitt trigger with limiting network, as shown in Figure 15 34(a) Show that the crossover voltages are those given in Figure 15 34(b) VREF 100 ww ww R D D2 1 1 1 ww 1 vo (VREF 2Vy) VTH R R R R VTL (VREF 2V) R R VREF R (VREF 2Vy) ww (b) (a) Figure 15 34 (a) Inverting Schmitt trigger with diode limiters and (b) voltage transfer characteristics (VREF 2V7) VI

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Question: Consider the inverting Schmitt trigger with limiting network, as shown in Figure 15.34(a). Show that the crossover voltages are those given in Figure 15.34(b). VREF

Consider the inverting Schmitt trigger with limiting network, as shown in Figure 15.34(a). Show that the crossover voltages are those given in Figure 15.34(b).

VREF 100 ww ww R D D2 1 1 1 ww 1

VREF 100 ww ww R D D2 1 1 1 ww 1 vo (VREF + 2Vy) VTH R R+ R R VTL =- (VREF+ +2V) R+R -VREF R -(VREF+2Vy) ww (b) (a) Figure 15.34 (a) Inverting Schmitt trigger with diode limiters and (b) voltage transfer characteristics (VREF+2V7) VI

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