Appeal No. 2002-0156 Page 5
Application No. 09/300,757
signal pulse completely, being approximately twice the width of the second output
signal pulse. Moreover, as we view these first and second output signal pulses with
respect to the two clock signal pulses, input signal at Figure 2A and reference signal at
Figure 2B, it appears clear that when the reference signal pulse lags behind the input
signal pulse by a certain magnitude, we get the condition that the first output signal
pulse overlaps the second output signal pulse by about 2/3 of the second output signal
pulse width. When the reference signal pulse is in phase with the input signal pulse,
the first and second output signal pulses also seem to exactly overlap each other.
Finally, when the input signal pulse lags behind the reference signal pulse, then the first
output signal pulse overlaps the second output signal pulse completely, approximately
twice the width of the second output signal pulse.
Clearly, then, the waveforms in Figures 2A, 2B, 2F and 2G of Noguchi show an
adjustment of an amount of overlap of an up output signal pulse and a down signal
pulse based, at least in part, upon the magnitude of an amount of phase delay between
two respective clock signal pulses applied to the two input ports, as claimed.
Appellant’s argument regarding the pulse width of the first output signal not
changing regardless of the phase delay between the two applied signals is not
persuasive because the argument is not based on claimed limitations. In accordance
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