Appeal No. 97-1784
Application 08/011,068
node in a particular path within a data processing system. The
tuning is done by automatically adjusting the time of arrival
of the clock at the selected node so as to correspond with a
predetermined timing so that the clock should arrive at this
point to initiate some desired function. The time of arrival of
a clock pulse at a particular node can be controlled by selecting
the amount of delay inserted into the particular clock line.
In column 3, line 44, through column 4, line 9, Collins
teaches with reference to Figure 1 that the service system 10
initiates an oscillator 12 which provides timed clock pulses of
a predetermined frequency. An output from the oscillator 12 is
connected to a programmable delay chip 14. This unit is under
the control of the service system 10 and provides the delay which
is ordered by the service system. This delay is applied to the
clock pulse from the oscillator 12 producing a delayed clock
pulse which is then applied to various logic and array chips
within the system being tuned. The delayed clock pulse is then
applied to the time detector unit 20 where the delayed clock
pulse is compared to a reference time pulse produced by a
reference generator circuit 22. The results of the comparison is
5
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Last modified: November 3, 2007