Lowpass Filter using CES 3320

Features

  • 4 Pole Voltage Controlled Lowpass Filter
  • Two tracking C.V. inputs, one sweep (inverted) C.V. input, Initial Frequency control
  • Adjustable Q into oscillation, with Initial Q control and Resonance C.V. input

    • Notes

    Just about any opamps can be used.

    Resonance control rejection trim: Apply a low frequency sinewave to Resonance C.V. input. Adjust R17 for minimum output.

    Frequency control voltage rejection trim: Apply a low frequency sinewave to a Track or Sweep control voltage input. Adjust R26 for minimum output.