Electronics Query: Function of IC11B, D30 and D31 in the VCO

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Electronics Query: Function of IC11B, D30 and D31 in the VCO

Post by Guest »

So I am trying to wrap my head around what this wonderful little box is doing.

I am a bit confused about D30 and D31. My guess is that they are there to deal with any potential problems from CV in, so that any spikes, or power badness could be routed to positive voltage or ground, instead of the sensitive IC's (IC9, IC11 and IC12). But if that is the case, why are they backwards?

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