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/diy/ - Do It Yourself

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>> No.1490026 [View]
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1490026

>>1490015
>>1490017
you do not need a negative rail for this circuit, just a rail-to-rail op amp. none of the terminals of this op amp will ever be below 0V, specifically because the op amp's feedback will produce a positive output to cancel what would otherwise be a tiny negative voltage generated at the inverting terminal by the photodiode.

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