Two p-n junction diodes D₁ and D₂ are connected as shown in figure. A and B are input signals and C is the output. The given circuit will function as a _ _ _ _ .

Step-by-step solution

If A = 0 and B = 0 : Both diodes are forward biased. The potential at C is pulled down to approximately 0V (logic 0). If A = 0 and B = 1 : Diode D₁ is forward biased, pulling the potential at C down to 0V (logic 0). Diode D₂ is reverse biased. If A = 1 and B = 0 : Diode D₂ is forward biased, pulling the potential at C down to 0V (logic 0). Diode D₁ is reverse biased. If A = 1 and B = 1 : Both diodes are reverse biased. No current flows through the resistor R , so the potential at C remains at V_ dc = 5V (logic 1).