Andrew Beckett
Senior Fellow
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Life, don't talk to me about Life...
Posts: 1742
Bracknell, UK
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The trouble is that each of your 80 current probes is essentially a zero-volt source between in and gnd - and so each of these are in parallel, and thus causes the loop of rigid branches.
You could put some impedance in series with the current probe, but I'm not sure that's really what you want - because are you really measuring the current properly then? Perhaps you need to separate the current measurement using (say) a current-controlled voltage source (e.g. a ccvs) and then connect the voltage output of this to all the 80 stages?
There's almost certainly other ways of solving this, but this was the first that came to mind (especially without knowing the details of what you're really trying to achieve).
Regards,
Andrew.
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