At 01:04 AM 12/2/2008, David G. Dixon wrote: >I would like to design a VCO which can morph smoothly from up-ramp to >triangle to down-ramp, preferably under voltage control. The SNICster does upramp to tri. You could probably jigger up a switch or something to continue on to downramp. Ian http://home.comcast.net/~ijfritz/sy_cir10.htm