The SVF BP gain is set by R4 and R5 similar to an inverting op amp stage. The overall Boost/cut is also influenced by R1 and R2. Note: if you change the BP gain that will also shift the Q or bandwidth of the SVF (higher BP gain will track narrower bandwidth IIRC).FETlife said:So if I understand it right, R5 sets the gain for the BP out? Which in turn increases or decreases the max cut/boost?
As I tried to explain in my earlier post the boost cut is the combination of the SVF BP gain and and that BP output fed into the + input of U1A.FETlife said:Thanks John, what still confuses me is that if R1, R2, R4 and R5 are all 22k-doesn't that imply unity gain?
Suppose what I'm getting at is, how to calculate the gain given the above values? Or is it a bit tricky and easier to just build it and measure?
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