Appeal No. 1998-1700
Application No. 08/268,460
column 22), Tjahjadi states that "the primary sampling point
lies exactly at point P" (again using the singular form of the
word). Thus, the portions relied upon by the examiner are
ambiguous at best as to how many zero-crossing points, and
more specifically how many positive-going zero-crossing
points, are used to generate the sampling clock.
Taking the entire disclosure as a whole, we find that
Tjahjadi uses a single positive-going zero-crossing point each
cycle, as argued by appellant (Brief, pages 5-8). Tjahjadi
discloses (column 23, line 8-column 24, line 37) taking four
samples per cycle, determining which is the primary sample
point or the point closest to the positive-going zero-crossing
point, calculating the lead or lag step size from the
positive-going zero-crossing point, and adjusting the
recovered baud clock to cause the primary sampling point to
occur at the zero-crossing point. In other words, multiple
sample points are used to generate the sample clock, but not
multiple positive-going zero-crossing points. The clock,
rather, is generated so that the primary sample point
coincides with a single positive-going zero-crossing point.
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