[sdiy] circle waveforms?

[Ordeish at aol.com]

 Hi all, I am away from most of my synths and have only been able to play around on the single synth where I am in Jersey. 
:(

 In playing around though I have found some very interesting waveforms for use with the LFO (by the way the synth is not analog please dont flame me! Its a Kurzweil K1000)

 Anyway one of the waves is a "circle wave" I have been playing around with it as a modulator, but cant put my finger on what it is exactly. Can anyone help me out? BTW the waveforms for the LFO's on this are amazing! stairs, cosines, falling saw, rising saw, pink noise, white noise, blue noise, many more. Very fun!

 Can anyone tell me more about a circle wave? what is it exactly?

 thanks

 Edward