Appeal No. 97-1784
Application 08/011,068
provided to the service system 10 which responds by adjusting the
delay introduced by the programmable delay chip 14 to thereby
change the phase of the delayed clock pulse so that it will
correspond with the generated reference time pulse.
In column 5, lines 1 through 26, Collins teaches that
Figure 3 shows the block diagram of the programmable delay
chip 14. Upon a closer review of Collins, we find that Collins
teaches that the programmable delay chip 14 is able to adjust the
phase of the clock pulse and the phase is changed so as to bring
the clock pulse in phase with a reference clock pulse. However,
Collins does not teach adjusting the propagation delay of a
variable delay circuit such that a period of a time signal is
converged upon by the propagation delay of the variable delay
circuit.
Appellants argue that one of ordinary skill in the art
would have no motivation or incentive to modify Rubinstein and
Collins so as to adjust the propagation delay of a variable delay
circuit such that a period of a time signal is converged upon by
the propagation delay of the variable delay circuit.
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