Appeal No. 2000-1259
Application 08/815,894
For the foregoing reasons, the rejection of claim 43 and its
dependent claims 44 and 52-56 based on Dudley is reversed. For
the same reasons, so too is the rejection of independent method
claim 57, which similarly recites "reconfiguring the timing
recovery circuit and the gain control circuit before the sequence
detector finishes processing the discrete time sample values of a
current sector so that the read channel can begin acquiring an
acquisition preamble of a next sector, thereby reducing a
physical gap between sectors on the magnetic disk medium," and
its dependent claims 58-63.
Turning now to Figure 2 of Petersen, Appellants do not deny
that the claimed timing recovery circuit reads on data
synchronizer 67, that the claimed gain control circuit reads on
automatic gain control circuit 51, and that the claimed sequence
detector reads on pulse detector 63 in combination with encoder
and decoder 73 (Answer at 3). We note that control signal SGT
(Figure 3(B)) causes each of automatic gain control circuit 51,
filter system 55, and pulse detector 63 to be configured in one
way during servo burst intervals (signal portion 143 in
Figure 3(A)), while control signal RGT causes each of those
circuits to be configured in another way during data intervals
(signal portions 141 and 154 in Figure 3(A)). Id. at col. 6, ll.
11-24 and 42-66; col. 9, ll. 14-31 and 58-64. However,
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