On Sat, 12 Oct 2002, Jinx wrote: *>http://home.clear.net.nz/pages/joecolquitt/FETbridge.html Problems I can see: If you chop the high side you will need very fast optocouplers. Chop only the low side (leave the high side transistor on). The high side drivers supplies are a little strange. You sure hate decoupling capacitors. May I ask what you used to draw the circuit ? (Looks like what I use ... ) Peter -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body