Pennie & Edmonds LLP
Impedance controlled output driver
 An output driver has an output multiplexor and an output current driver. The output multiplexor receives a data signal and outputs a q-node signal. The output current driver receives the q-node signal and drives a bus based on the q-node signal. The output multiplexor processes the data signal in various ways to generate the q-node signal. The output current driver is responsive to current control bits to select a amount of output drive current. In addition, the output multiplexor is controlled such that the output impedance of the output current driver is maintained within a predetermined range. 
Rambus Incorporated
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H03K H03K G11C
inventional inventional inventional
Michael Tak-Kei Kurt T. Jun Donald C. Natsuki
Ching Knorpp Kim Stark Kushiyama