Frequency Shifter combined with Thru-Zero Quadrature VCO

This frequency shifter utilizes a so called Dome filter to perform sine / cosine transformations combined with two precision multipliers for a sine / cosine signal. It includes a mixer for two audio signals, balance pot from ring-modulation to single side-band suppression (=frequency shifting). To obtain this sine / cosine carrier signal a Doepfer A110-4 is incorporated.

The RMO knob allows continues shift between ring-modulation (only one multiplier) to single side band suppression. You can create interest sound in between and enables you to tune exact SSB balance for your signal. The input mixer allows you to insert a digital delay for delayed shifts. Simply use a patch cord from second out to input to get a special kind of phasing. It is a variation of so called „Barber pole“ phasing.

Modulations VCO: For up or down shifts the phase must be inverted. Doepfer’s A110-4 produces sine/cosine and shifts phase with LFrq pot. Modulation for LinFrq and XFM for extraordinary shift sounds get possible. Basic design of A110-4 was intended to use in FS – systems. The VCO is changed into LFO mode using a 1nF capacitator (see the description on Doepfer site).

• ? mA +12V
• ? mA -12V
• ? mA 5V
• 60 mm Depth

This Module is currently available.