Olin Lathrop wrote: > Roman, I agree with Dave's analisys too. Here's another way to look at it: > > One characteristic that differs between linear and switching regulators is > where the output current comes from. In a linear regulator, all the output > current comes from the input supply. In fact, except for the small current > used to power the regulator itself, the output current equals the input > current. Ha ha! Yeah I posted that about 3am and realised the next morning I got my efficiencies backwards. Slow decay is great for keeping the field and current high in a motor winding, where the circuit being discussed needed the exact opposite effect. :o) -Roman -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads