On Mon, Sep 5, 2011 at 9:35 PM, RussellMc wrote: > Zeners to ensure gate drive voltage does not exceed FET maximum > allowed - depends on FET and supply and high side drive voltages. > Thanks. Will do. > Note potential time constants from R + C_FET > I'm not worried about switching times. This is a very very low frequency switching application. About a switch per hour or so. Judging from the SPIC= E graphs alone, the switching times are more than enough for my purpose. I'm even just considering a mechanical relay, but only if I can find one physically small enough, that can handle 2A at a maximum of 10V. > Simple diode pump with 2 capacitor coupling. Similar circuit used for > floating panel meter supplies. Can supply cct later if needed. > Sounds very interesting. Going to look into it now. Please supply any information/circuit for this. I will find it very useful. Damn - I have so many ideas, but not enough EE knowledge to take advantage of it. Wish I knew all these "techniques". Wish I had more time to study them. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .