On Sun, Jun 19, 2011 at 12:33 PM, Michael Watterson wrot= e: > You were told several times. > My humble apologies. > At "saturation" a BJT looks like a constant voltage. Nothing like a > resistor. I understand this. Thank you. At "saturation" an Enhancement FET is a bit like a voltage controlled > resistor. (VGS sets resistance). > > If not saturated then a depletion jFET or BJT is a little like a > constant current source. > > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .