[sdiy] 36dB VCF output drop while increasing emphases

Harald sdiy at haraldswerk.de
Fri Apr 17 14:08:11 CEST 2015


I am just working on a 36dB VCF. Plain forward design with LM13700. 
First steps here:  http://www.haraldswerk.de/wrdprs/ . As we know, 
output level decreases with feedback (Q). This can be compensated with 
increasing the output gain while increasing Q. But then the peak level 
of the output will be way higher as the normal output. Which might cause 
distortion in the next stage. Is there a compromise to avoid this or do 
i need to select: Lower output or increased distortion?

Second thought: The filter works quite good. Does it make sense to go 
for 48dB musicaly?

Harald

www.haraldswerk.de



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