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RS-120 Comb Filter

Analogue Systems

  • $ 17900

Voltage Controlled Comb Filter

  • 10 mA +12V
  • 10 mA -12V
  • 0 mA 5V
  • 2.5 inches depth
  • 12 hp


The filter is based on a bucket-brigade-device delay with very short times that clearly changes the phase of the signal. The feedback of this delay is used here as a resonance parameter that goes up to self-oscillation.

There are two audio inputs with level control. Unity gain is reached at the pot´s position 4, beyond thsi point the filter will be overdriven. A control sets the delay time from 2.5ms to 25ms and in addition there are two CV inputs for controlling delay time, one with fixed 1V/oct and a variable one.

CV: one input with 1V/octave and one variable input with attenuator.
Audio: 2x signal input, 1x signal output

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