Hey,
Well, efficiency is irrelevant of the absolute power draw
http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif Yes, you are quite correct, FPGAs are quite power hungry as it is... so all one can do is make sure that whatever poewr it does happen to draw gets converted efficiently. That, and any other peripherals have power-off capability. I'm not hoping for days of operation on batteries.. but maybe something to approach a few hours of operation on typical batteries. Power isn't the number one priority for me however; modularity and size is.. there's not much more I can do about the FPGA being a power hog!
J