Find the worst case input required current for one of the load gates when the output of the driving gate (Vout=VIH.(10)

Given: Br=20, Vref-1.2V, VBE(on)=0.7V , VD(on)1,2=0.2V 2k 1.68k 2k Q3 NPN D1 Vi1 If Q1 NPN Q2 NPN -1.2V Vout D2 VI2 5.33k 23k -3.3V -3.3V Figure 3 (a) Find the function of the gate by giving the truth table. (2) (b) Find Vil. (3) (c) Find VIH. (3) (d) Lets say we have N number of load gates identical to the driving gate in Figure 3. Find the worst case input required current for one of the load gates when the output of the driving gate (Vout=VIH.(10) (e) Find lou when the output of the driving gate is ViH. (10) (1) Find N “I” from part d) and e). (2)

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