A sidequest, already

A project log for YGREC-ECL

At the opposite site of the spectrum, this project is incredibly smaller and faster than the relay implementation of YGREC.

yann-guidon-ygdesYann Guidon / YGDES 04/10/2017 at 03:130 Comments

The project has received all the 5400 dual-transistors (with the hope that 10800 transistors will be enough, but you never know, right ?) and already a question arises : how to test them ?

I have the fast DDS but the BFS480 is one notch higher. So the idea is to see if it can be used for an avalanche pulse generator to generate sub-nanosecond signals ?

I have seen the venerable 2N2369 used for this purpose but it's a 50-years old part. The BFS480 is not only faster, but also has lower breakdown voltage, which is a nice thing, no ? A dumb oscillator and simple charge pump should be enough to generate the low-current higher voltage that such a circuit needs.

Some background and references

but I have never seen a low power UHF transistor.

AN72 however covers the "balancing" technique, using a pulse transformer to create a symmetrical pulse. This will be needed to test the transmission lines of the clock and control pulses...