In electronics, emitter-coupled logic, or ECL, is a logic family in which current is steered through bipolar transistors to prevent saturation.

Ilv

Yes it is. Yes it is.

The main limitation on the use of Emitter Coupled Logic is that it is very very power hungry, so the devices tend to require a significant cooling system to remove the waste heat. But in most systems where the speed advantage offered by Emitter Coupled Logic is deemed a necessary requirement, this is usually considered a minor price to pay.

This is used in order to amplify the different digital sounds that are coming through. A disadvantage may include that it can get confusing with all of the sounds.