No data found

Close

DIY MFOS 8-Stage Phase Shifter KB

We always recommend visiting the MFOS website before building where the latest 'offical' information and news can be found. Here on the Soundtronics website, you will find selected information from the MFOS site plus additional information and resources to aid the building and maintaining of your MFOS synth. This is not going to happen over-night but during the course of 2014, it will start to take shape as we document our experiences in the construction of these modules. We would also like to include any experiences, hints and tips from customers as well so feel free to contact us or simply post a comment using the form at the foot of this page.

Introduction to the MFOS 8-Stage Phase Shifter

This phase shifter is designed around the phase shift cell found in several 1970s to 1980s units. It is not an exact copy of any of them but is modeled after them. It uses a transconductance amplifer to produce a voltage controlled variable phase shift. Mixing the phase delayed signal with the original produces notches in the resultant output.

Features

  • Switchable 4 or 8 stage phase shifter.
  • Variable feedback ranges from mild swooshing to raucous mind bending.
  • Two external control voltage inputs.
  • Pseudo stereo output when 4 stage and 8 stage outputs are used.
  • Transconductance amp based phase shift cells.
  • On-Board LFO produces Triangle and Ramp waves.
  • Phase angle is modulated in a logarithmic fashion.
  • 8 Stages of phase shift result in some sweet barber pole effect.

Documentation & Downloads

Under Construction