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Current measurement from constant current source

I have a constant current circuit using an op amp circuit. I am implementing a current of 21 mA to drive a laser. Spec of laser: https://www.thorlabs.com/thorproduct.cfm?partnumber=L650P007 I would ...
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Photodiode, analog electronic

I am a beginner PSPICE, in simulation electrical and electronics circuits. I want to simulate a schematic with the program Micro-CAP 12. I want to look for some graphics from a photodiode PIN which ...
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