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Which of the following logic is the fastest ?

Which of the following logic is the fastest ? Correct Answer ECL

Emitter-coupled-logic (ECL):

  • Emitter-coupled-logic (ECL) is a BJT logic family that is generally considered the fastest logic available.
  • ECL achieves its high-speed operation by employing a relatively small voltage swing and preventing the transistors from entering the saturation region. (Reduces the storage delay time).
  • ECL transistor uses differential amplifier configuration as shown:

 

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Logic Family

Full Name

Advantages

Disadvantages

CMOS

Complementary metal-oxide-semiconductor

1) Lowest power consumption

2) Used in all microcomputer chips today.

3) Most common logic family.

Easily damaged by static discharge and voltage spikes.

TTL

Transistor-transistor logic

1) Earliest developed.

2) Most rugged.

3) Least susceptible to electrical damage.

Consumes more power than CMOS – not suitable for battery-operated devices.

ECL

Emitter-coupled logic

Fastest available logic family

Consumes more power than CMOS. It requires extreme care in the wiring.

Related Questions

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