The QLFO is a quadrature sinewave LFO featuring voltage control of frequency. Due to a wider range of frequency and a 1V/octave input it can be used as a sinewave oscillator as well.

The LFO's rate is determined by the Rate potentiometer and the three position switch (slow, mid, fast). Two CV inputs allow for external control - one has a fixed characteristic of one volt per octave and the other is equipped with a polarizer for setting modulation intensity and polarity.
Four sine waves are available simultaneously, each is 90° phase shifted.
To be correct you have to say a sine, a cosine and their inverted counterparts are generated.