At 08:52 10/26/2001 -0400, Olin Lathrop wrote:
> > you should use a buffer amp for each of the photodiodes.
>
>I don't think this is needed.  Photodiodes aren't *that* high impedance.

I guess this depends on what you want to do, mainly on the bandwidth and
precision required. For the bandwidth, it's not the (resistive) impedance,
it's the capacitance that is the problem, which forms a low pass with the
load resistance.

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