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Generating a current between 0 - 250 mA for a load up to 40 ohms

VerifEng said:
Was there a reason why the Negative power suply is connected to ground? Why not -15 V?
Click to expand...
Because the circuit does not need -15V to operate since the output is always positive, and that particular op amp is rated for 16V max between the plus and minus supply pins.
 
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