Question

28. Which of the following is the fastest logic ?
(a) TTL
(b) ECL
(c) CMOS
(d) LSI​

Answer 1

Answer:

ECL is the fastest logic.

Because:-

ECL is the fastest of all the logic families because of the emitters of many transistors are coupled together which results in the highest transmission rate.

Answer 2

Answer:

Explanation:

The fastest logic:

ECL (Emitter-coupled logic):

Emitter-coupled logic is the fastest of all digital logic families.

At IBM in 1956, Hannon S. Yourke came up with the idea. Additionally known as present mode logic. Transistors and resistors make up the ECL circuit architecture.

The ECL logic family achieves high-speed operation by preventing transistor saturation. To flip between the two voltage levels, a very little voltage swing is required. As the transistors operate in saturation mode, transistor-transistor logic cannot do this.

A staggering propagation delay of 1ns is provided by the emitter-coupled logic family. In the most recent ECL families, the latency is more reduced dramatically.

ECL is the fastest logic.

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