XR-VCO (big version)

Square, Tri & Sine Wave Oscillator with Sync, PWM, lin / exp FM and a Waveshaper.

It is a precise Sinwave VCO. Good for moulatiion, wavefolding and FM.
PWM, lin & exp FM and the waveshaper can be controlled via CV. The Square Wave output is labelled "Ramp" in the picture.
The oscillator has been measured to track precisely over 7 octaves. The waveshaper is Buchla-inspired.
The module draws 100 ma for the first 20 seconds to warm up, then drops to 65 ma.

http://www.klangbauköln.de/klangbau-in-koeln/vco-mit-xr2206/