Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> The same is true for IC design. Nchannel devices are faster than Pchannel due to electon mobility. > Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br> > > The reason for the difference is the larger mobility of electrons, but > it's not easy to see exactly how the mechanism operates.