Appeal No. 96-3054
Application 08/134,147
detector is equivalent to Appellant’s first phase detector.
However, we do not agree that Koskowich’s frequency detector
is actually a phase detector which detects a phase difference
greater than a cycle. Koskowich states, “The Sequential Error
Detector (SPED) [hence the frequency detector] is active only
while cycle slipping is occurring.” (column 5, lines 37 and
38). Cycle slipping occurs when the phase error reaches 180
degrees (note Koskowich, column 5, lines 34-36, “thereby
indicating the absence of cycle slips, i.e., the phase error
never reaches 180 degrees.”) Thus, Koskowich’s frequency
detector provides a second signal at less than a single cycle
(at 180 degrees), a single cycle being 360 degrees (note
Appellant’s specification at page 23). This is contrary to
that claimed by Appellant, i.e., “providing a second phase
detector output signal representative of a detected phase
difference greater than a single cycle;” (claim 15, lines 7
and 8, emphasis added). Thus, we need to go no further, and
will reverse the Examiner’s rejection of claims 15 and 16
since the necessary elements are not found in Wong or
Koskowich.
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