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Wide range Current Sink

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alzomor

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Hi

I am designing a wide range current sink.
the desired range from 50uA to 5mA.
I have tried several designs but non of them covers the whole range.
Do you have any suggestions?

my last design is using op amp with voltage feed back from the output stage and a darlington/Fet transistor for load driving.
this design works up to 3mA

Salam
Hossam Alzomor
www(.)i-g(.)org
 

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