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State Variable Filter

Jürgen Haibles clone of the EDP Wasp VCF. Its a state variable filter build arround one CD4069UB CMOS inverter, that is used as opamp. This circuit is operated at a single 5V supply. It has a rather interesting distortion. Original description...   A useful addition would be to have a switch to have the distortion either pre or post filter.

Circuit! Wasp filter clone

Circuit! A 5V EG/LFO for use with this filter