I could have sworn I had put this circuit on the blog before, but having failed to find it, here it is, possibly again. I have combined op-amps and mosfets to make high-current sinks, and had mixed results, sometimes making oscillators. The error I have discovered (see diagram below), is to simply connect the op-amp ...
Read full article: The right way to do a current sink
from Electronics Weekly http://www.electronicsweekly.com/blogs/engineer-in-wonderland/right-way-current-sinksource-2016-09/
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