Q1. Consider the logic gate circuit shown below. Let VD(ON) = 0.7 V. a) What is the logic operation performed by the circuit? Justify your answer. b) Find R₁, so that VOH = 4 V. c) If VIN₁ = VIN₂ = VIN, draw the Voltage Transfer Characteristics (VTC) of the circuit. Clearly show the states of the diodes on the graph. d) How much noise can the circuit tolerate before it malfunctions? (For both high and low logic levels) о K K 67 78 R₁ D1 Vener = 9V DA ++ -OVOUT Dz 10 ko -5VO