A driver circuit including of one or more fingers, or parallel driver circuits, senses for an overshoot or an undershoot condition of the signal transmitted onto a transmission line coupled to the driver circuit and compensates for such an overshoot or an undershoot by temporarily turning off the...http://www.google.fr/patents/US5789937?utm_source=gb-gplus-shareBrevet US5789937 - Impedence self-adjusting driver circuit
