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2017-08-20 08:20  
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This circuit uses a CA3193 precision op amp to deliver a current independent of variations in RL. With RI set equal to R3, and R2 approximately equal to R4 R5, the output current, h. is: VlN (R4)/(R3) (R5).

500-I`A load current is constant for load values from 0 to 3ohm.

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