Lance R Lee, 66Knoxville, TN

6266799, Jul 24, 2001

Nov 10, 1997

8/967087

Lance K. Lee - Milpitas CA
Jyn-Bang Shyu - Cupertino CA
David Y. Wang - San Jose CA

Xaqti, Corporation - Camarillo CA

G06F 1750

716 6

Disclosed is a data/clock recovery system for use in a high speed networking transceiver units. The data/clock recovery system includes a four phase sampler circuit that is configured to receive a data input waveform and produce output data. A transition detect circuit that is arranged to receive the output data produced by the four phase sampler circuit. The transition detect circuit is configured to determine whether a clock is leading or lagging the data input waveform. A counter for shifting the clock if the clock is determined by the transition detect circuit to either be leading or lagging the data input waveform, such that the shifting is configured to synchronize the clock and the data input waveform. A decoder that receives control signals from the counter, such that the decoder generates a selection signal. The data/clock recovery system further including a multiplexer for selecting four predetermined clock phases in response to the selection signal generated by the decoder.