[sdiy] Photodiode Ladder Filter?

[Scott Gravenhorst]

Crazy thought I had, maybe not so crazy?  

I was researching IR photodiodes to be used in a non-synth project when I thought - what if photodiodes controlled by LEDs were used to create a diode ladder filter of some kind - is this even possible and/or has it been done?  

What I've read about photodiodes is that in photoconductive mode, they are usually reverse biased - would this present a problem in something like a filter?  

I'm not a filter giant, certainly not a ladder filter giant, I'm just asking...

-- ScottG
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-- Scott Gravenhorst
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