thanks.. i'll check it out. I fixed the schematic with olin's suggestions..
including bypass capacitors, and AC coupled gain stages.
https://wiki.duke.edu/download/attachments/10715668/PulseOx_rev3.png

On Thu, Apr 2, 2009 at 10:39 PM, cdb <colin@btech-online.co.uk> wrote:

> You might want to check out the datasheet for the Analog Devices
> AD795, this op-amp is often used as a photodiode pre-amp, and figures
> 42 and 46 might have just what you're looking for.
>
> Colin
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> cdb, colin@btech-online.co.uk on 3/04/2009
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