> My question (hopefully not stupid, but possibly naive as I am just > a physicist and not an EE) is this: can't the same thing be done > with a series inductor? In that case, energy stored in the > magnetic field of the inductor would be available to resist > attempted changes in the voltage level. Inductors oppose a change in current (not voltage) Capacitors "dislike" a change in voltage. michael brown -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads