The GATE Grind

GATE 2019 EE – Question 46

Analog and Digital Electronics · VCOs and timers, combinatorial and sequential logic circuits, multiplexers, demultiplexers · 2 marks · Multiple choice

In the circuit shown below, X and Y are digital inputs, and Z is a digital output. The equivalent circuit is a

Diagram for GATE 2019 EE question 46
  1. NAND gate
  2. NOR gate
  3. XOR gate
  4. XNOR gate

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Show answer and explanation

Correct answer: (C) XOR gate

Explanation

The two AND gates compute $X\cdot\bar Y$ and $\bar X\cdot Y$ (each has one inverted input), and the OR gate combines them: $Z=X\bar Y+\bar XY$, which is the XOR function.