We used them in the supercomputer space long long ago. Mount 8 die to
ceramic substrate, mount those to Rogers boards. Thermal wasn't really an
issue as everything was bathed in Flourinert™.
Was an interesting project. The Unix kernel scheduler had to make
scheduling decisions based on all the
As Dr K said, traceable and usefully calibrated are not necessarily connected.
I can calibrate to any arbitrary standard I like. That standard need not be
traceable if all that is important to me is consistency across all the
instruments in my lab.
If I, on the other hand, want to be
There was a Circuit Cellar article on this many moons ago.
Basically, it was:
Take a torroid ferrite core, wrap ~20 turns of #20 through it, pass the wire
you want to sense current in through the core, and hook the output of the coil
to an op amp. Look at output of op amp with a/d converter.
