Appeal No. 95-1865
Application 07/970,816
channels, the receive clock for a second channel is generated having a fixed phase offset with
respect to the receive clock on the first channel and the second channel transmit clock is adjusted
to optimally relate the second channel data signal to the second channel receive clock.
Representative independent claim 1 is reproduced as follows:
1. A system for bidirectionally communicating data signals via first and second channel
media where each channel medium is connected between a different pair of first and second
transceivers, said first transceivers being located at a first station and said second transceivers
being located at a second station, said system comprising;
master clock generator means for applying a transmit clock to said first transceiver of said
first channel medium;
clock recovery means connected to said second transceiver of said first channel medium
and responsive to a data signal received via said first channel medium for applying a receive clock
to said second transceiver of said first channel medium;
phase delay means for applying a receive clock to said second transceiver of said second
channel medium delayed from said receive clock of said second transceiver of said first channel
medium;
detector means for detecting a phase error between said delayed receive clock applied to
said second transceiver of said second channel medium and a data signal received thereby via said
second channel medium; and
means responsive to said detected phase error for adjusting the phase of a transmit clock
applied to said first transceiver of said second channel medium to minimize said detected phase
error.
2
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