Patent ID: 6294924
Filing Date: 2001-09-25
Classification: H03K

Abstract:
A driver, the driver capable of launching signals at a driving end of a transmission line and capable of terminating signals at a receiver end of the transmission line, the driver having an impedance control system and a slew rate control system, the driver comprising:a pull up circuit having an impedance, the pull up circuit including a pull up output circuit, the pull up output circuit including a parallel pull up circuit, a pull up output control circuit, and a pull up slew rate control circuit, wherein the parallel pull up circuit and the pull up output control circuit are coupled in parallel;a pull down circuit having an impedance, the pull down circuit including at least one pull down output circuit, the at least one pull down output circuit including at least one pull down slew rate control circuit, a parallel pull down circuit and a pull down output control circuit, wherein the parallel pull down circuit and the pull down output control circuit are coupled in parallel; anda plurality of output elements within the pull up circuit and the pull down circuit, wherein the plurality of output elements are selectively enabled and disabled with a controlled slew rate.