Question

For the circuit below, identify the logic gate:

• A. AND
• B. OR
• C. NAND
• D. NOR

Hint:

In diode logic with a pull-up resistor, {output goes LOW if any diode conducts}, and {output stays HIGH only when all diodes are reverse biased}.

Answer 1

The Correct Option is A

The given circuit diagram needs to be identified as a specific logic gate. Let's analyze the configuration:

1. The circuit has two input points, labeled as A and B, connected to two diodes.
2. These diodes are connected in such a way that if either input A or B has a low signal (0V), the voltage at the output y will be held low.
3. This configuration resembles a two-input AND gate where the output is high only when both inputs are high.
4. If either input is low, the diode associated with it will conduct, pulling the output down to 0V.

Therefore, when both A and B are high (5V), both diodes remain off, allowing y to be high, matching the behavior of an AND gate.

Hence, the logic gate for the given circuit is the AND gate.