"If the OscPM is set to 0 Hz in the Part tuning mode and initially reset by a short pulse on the Sync input (e.g. by using the Status module Var. Change output) this module can act as a sine function. To use this option, open the Phase Mod knob fully and add a linear mixer in front of the Phase Mod input. If the linear mixer knob is set to [6.3 (8)], a control signal between -64 and +64 units will cover exactly 360 degrees of a sine function. The sine value will be available on the output of the module." (from the manual).

EDIT:
Here is a patch that uses the sine shaper. A triangle wave is clipped to make a square with variable slope sides. Passed through the sine shaper you get a sort of CZ101 phase distortion, resonant sweep. Without using a filter.


 cz101.pch2