Minimoog VCF

Transistor Ladder (Minimoog) Filter

Well, it was meant to be! I could not possibly avoid building a clone of this very successful and famous filter: the Minimoog VCF!
This filter has a sound of its own that contributed to the success of many songs during the 70s and 80s.

My aim here was to design a quite faithful copy of this mythic filter while using components that minimize the burden of selecting a great number of matched transistors. This is why I used cheap transistor arrays (CA3046). As for all the other filters of my YUSYNTH project, I have added an input and an output buffer to adapt this filter to the input and output levels of my modular system.
Because, my power supply standard is +15/-15V, some values of resistors had to be modified.

http://yusynth.net/Modular/EN/MOOGVCF/index.html