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Test: Emitter- Coupled Logic - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: Emitter- Coupled Logic

Test: Emitter- Coupled Logic for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Emitter- Coupled Logic questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Emitter- Coupled Logic MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Emitter- Coupled Logic below.
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Test: Emitter- Coupled Logic - Question 1

Which logic is the fastest of all the logic families?

Detailed Solution for Test: Emitter- Coupled Logic - Question 1

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.

Test: Emitter- Coupled Logic - Question 2

Sometimes ECL can also be named as __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 2

ECL (Emitter Coupled Logic) can also be named as CML(Collector Mode Logic).

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Test: Emitter- Coupled Logic - Question 3

The ECL behaves as __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 3

The ECL behaves as NOR gate because if any of the input voltages go high as compared to the reference voltage, the output is low and the output is high only when all the input voltages are low.

Test: Emitter- Coupled Logic - Question 4

ECL’s major disadvantage is that __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 4

ECL’s major disadvantage is that each gate continuously draws current, which means it requires (and dissipates) significantly more power than those of other logic families. But ECL logic gates have clock frequency. Thus, they have a fast operation.

Test: Emitter- Coupled Logic - Question 5

The equivalent of emitter-coupled logic made out of FETs is called __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 5

The equivalent of emitter-coupled logic made out of FETs is called Source-coupled logic(SCFL). Like ECL, SCL is also the fastest among the logic families.

Test: Emitter- Coupled Logic - Question 6

At the time of invention, an ECL was called as __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 6

At the time of invention, an ECL was called a current-steering logic because it involved current switching.

Test: Emitter- Coupled Logic - Question 7

Low-voltage positive emitter-coupled logic (LVPECL) is a power optimized version of __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 7

Low voltage positive emitter coupled logic (LVPECL) is a power optimized version of PECL using a +3.3 V instead of 5 V supply.

Test: Emitter- Coupled Logic - Question 8

ECL was invented in _______ by __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 8

ECL was invented in August 1956 at IBM by Hannon S Yourke.

Test: Emitter- Coupled Logic - Question 9

In ECL the fanout capability is __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 9

If the input impedance is high and the output resistance is low; as a result, the transistors change states quickly, gate delays are low, and the fanout capability is high. Fan-out is the measure of the maximum number of inputs that a single gate output can accept.

Test: Emitter- Coupled Logic - Question 10

In an ECL the output is taken from __________

Detailed Solution for Test: Emitter- Coupled Logic - Question 10

Though, the emitter and collector of the ECL are coupled together. So, the output will be taken from a collector.

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