On Mon, Sep 5, 2011 at 1:03 PM, RussellMc wrote: > A gate-source clamp > zener pair (back to back ) may be needed to protect FETs against > > Vgsmax drive. > Can you please elaborate on that? > I'd be slightly nervous about M3 connecting gates hard to ground - I'd > consider a series gate resistor. But logic says it's OK as is :-). > Sounds good. I put a 100k resistor between the gate and the mosfet. Also to avoid the whole gate source problem, is there a way to bring out an "isolated" supply from the normal supply rail, so I can independently bias the gate with an isolated ground on the source? Maybe using a switched capacitor method? Would there be ICs that do this? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .