We should probably pop in and say we're still around!!
It's just been *very* busy.
Our internship at #CERN ended in February, then it was moving back to Germany to start our master thesis.
Our time there was incredible, but I'm glad to move toward this important milestone!!
Maybe we should write a blog post about it :>
Our new task is just as exciting though!!!
Design of a high gain transimpedance (I.e. A to V) amplifier!
She's prett, isn't she?
TIA Core Version 2 - looking even more arcane than before!!
The old version used a LTC6268-10 - a great OpAmp with fantastically low leakage, bbbuuutt ... It grew unstable with input capacitance, noise level growing heavily until it clipped. Poor thing.
New version is using a dual-package ADA4817.
It's slower, which is why you put two after another to boost Bandwidth.
BUT 1/3 the voltage noise and it seems MUCH more stable.
We also took the liberty to just... Make it look a LOT cooler?
Why yes, we love taking a single ended 30kHz signal and splitting it into a differential one for an ADC.
Do they at least use proper twisted pairs?
Nah, apparently, their design idea was to use two separate SMA cables, one for each polarity.
The single to diff conversion really should be on the ADC board side ;-;
They don't even have a proper ADC driver amplifier on there!! Tsk tsk
Xasin, Neira & Mesh