> Yes, the opamp is pulling the input line to reference. If you want
something
> closer to vref, use a schottky diode instead of 1n4001.

Or just put the diode in the feedback loop.  The opamp will then adjust for
the diode drop automatically.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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