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What is meant by emitter coupled logic?
In electronics, emitter-coupled logic (ECL) is a high-speed integrated circuit bipolar transistor logic family. As the current is steered between two legs of an emitter-coupled pair, ECL is sometimes called current-steering logic (CSL), current-mode logic (CML) or current-switch emitter-follower (CSEF) logic.
What is emitter coupled logic gate discuss its characteristics and working principle?
Emitter-coupled logic (ECL) is a BJT-based logic family which is generally considered as 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.
Why Emitter Coupled Logic is also referred to as current mode logic?
Emitter Coupled Logic (ECL), sometimes referred to as Current Mode Logic, is an extremely high-speed digital technology. ECL has a propagation time of 0.5 – 2 ns, which is much faster than TTL.
What is the fundamental logic gate of the ECL?
Emitter-Coupled Digital Logic Gate Emitter Coupled Logic or simply ECL, is another type of digital logic gate that uses bipolar transistor logic where the transistors are not operated in the saturation region, as they are with the standard TTL digital logic gate.
What are the advantages and disadvantages of emitter coupled logic?
Following points summarize ECL advantages over TTL and CMOS: ➨It has fanout of 25 which is better than TTL and less then CMOS. ➨It has average propagation delay time ( 1 to 4 ns ) better compare to both TTL and CMOS. Hence it is known as fastest logic family.
What is the advantage of ECL logic?
Advantages of ECL Following points summarize ECL advantages over TTL and CMOS: ➨It has fanout of 25 which is better than TTL and less then CMOS. ➨It has average propagation delay time ( 1 to 4 ns ) better compare to both TTL and CMOS. Hence it is known as fastest logic family.
Which is slowest logic family?
However, CMOS is slowest among the given logic family because of the high input impedance (i.e., due to SiO2) takes more time for charging and discharging.