uVCF

Description

Introducing the uVCF state variable filter.

This is another great David Dixon filter design that has been on the workbench for a while. It is a very clean and precise filter that also doubles as an excellent sine VCO.

It responds very well to FM and the small size should make it a nice choice for smaller systems/lunchboxes.

Features:

• 6 hp
• skiff friendly
• Low Pass (LPF) 2-pole output, high pass (HPF) 2-pole output and bandpass (BPF) 1-pole output
• FM1 input acts as 1V/Oct when full CW tracks very well over 4+ octaves
• FM2 input has a bipolar attenuator
• At full Q you get very low distortion sinewaves with a range of 2hz to 20khz.