Category Archives: The theory

The basics

Embarking on this journey, i realised that it was som 25+years since I went to school, so I had to recap about ECL and other things, however it wasn’t that  difficult anyway.

I began with designing the base Circuit a 2 input ECL-gate and did some simulations in LT-Spice.

I realized that the type of transistor I was going to use affected everything quite dramatically, so I started searching for a decent tranny to use.

It seems that I ends upp with something called BFR92P.

Simulating it in LT-Spice it seems that, at least in theory, I should be able to run this computer att 500 MHz.

Here is a screenshot of the simulation.


Obviously, I realise that I would not be able to run at this frequency, as well as the problem designing a Clock oscillator with several phases with discrete Components, and furthermore, my function-genny cant go that high, only 20 MHz, so that will be the target, for now.