24dB VCF Lowpass

The circuit uses a classic 4th order transistor ladder filter core which gives a steep 24dB/octave cut slope. With enough resonance amount the filter will resonate by itself. The use of a VCA in the circuits feedback path adds voltage controllable resonance, which gives more possibilities in modulating the sounds. The amount of the FREQ CV and Q CV inputs can be attenuated onboard.

Tunable parameters:

  • FREQUENCY
  • FREQ CV AMT
  • Q
  • Q CV AMT

Inputs:

  • FREQ CV IN
  • Q CV IN
  • SIGNAL IN

Outputs:

  • SIGNAL OUT

Power:

  • +12V 14mA / -12V 12mA

Dimensions:

  • Width: 12TE (60.6mm)
  • Depth: 13mm