Original poster: dest <dest@xxxxxxxxxxxxx> Hallo Dave. > Original poster: Sparktron01@xxxxxxxxxxx > What op-amp are you using? i`m using built-in switchercad iii model "1pole" - parametrized single pole amp, Rin=500MOhm, voltage gain=10^6, 10MHz gain-bandwidth product, slew=10^6. ----- I don't doubt that my logic is flawed, could somebody tell me where? 08-08-97 (c) Gary Lau