At 05:22 PM 3/20/02 +0000, Dave Dilatush wrote: >Edson Brusque wrote... >Linear Technology, Inc. has a package they call SwitcherCAD III, >I haven't >tried SwitcherCAD myself, but I've seen favorable comments by >those who have. The price is right, for sure. To amplify on Daves response, I *have* used SwitcherCAD III. I have two things to say about it: 1. It correctly predicted how LT's switching power supply parts would work in circuit. My scope waveforms looked like those on the PC. 2. It is indeed a "full" spice version and it seems to work quite well. I built a few state variable oscillators and it produced the output I expected. Plus, as Dave said, "The price is right, for sure". It was possible to confuse it until it gave poor output (probably was not converging) but this is typical of any spice. It requires the user to know what they are doing and not just blindly accept what it says. Doh! I just downloaded it a month ago and found I like it a lot. I had tried it years ago and did not like it. I suspect both it and I have matured. OK, maybe just it matured. Finally, vis a vis recent discussions on this list concerning 'untried' new switcher designs, get thee hence to SwitcherCAD III and build your circuits there. Then you can find out what's up with them before unleashing them on the world. Tom M. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body