The GATE Grind

GATE 2023 IN – Question 22

Digital Electronics · Number systems and combinational logic · 1 mark · Multiple choice

Choose the fastest logic family among the following:

  1. Transistor-Transistor Logic
  2. Emitter-Coupled Logic
  3. CMOS Logic
  4. Resistor-Transistor Logic

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Show answer and explanation

Correct answer: (B) Emitter-Coupled Logic

Explanation

Emitter-coupled logic avoids transistor saturation and the associated storage delay by steering current between branches. In the conventional logic-family comparison used here, **ECL, B** is fastest.