The goal of putting systems on a chip has been a difficult challenge that is only recently being met. Since the world is analogue, putting systems on a chip requires putting analogue interfaces on the same chip as digital processing functions. Since some processing functions are accomplished more efficiently in analog circuitry, chips with a large amount of analogue and digital circuitry are being designed. Whether a small amount of analogue circuitry is combined with varying amounts of digital circuitry or the other way around, the problem encountered in marrying analogue and digital...