Appeal No. 1997-2681
Application No. 08/211,414
Thus, APA does recognize different information data frequency
bands in different zones. Furthermore, APA recognizes the
frequency band present in the picked up signal to select the
proper filter as recited in the specification at page 1, lines
22-25, wherein it states:
a signal controller 15 for recognizing the
frequencies corresponding to the servo data and
information data having different bandwidths
from each other, and generating a signal for
activating one filter corresponding to the
recognized frequency;
Thus, although APA is recognizing and selecting between the
servo data frequencies and the information data frequencies,
the basic concept of selecting filters based upon the
frequency content of the received signal is clearly taught by
APA.
Appellant argues that the Examiner’s alternative
rationale for selecting a filter, based on Abbott, is in error
because Appellant’s filters are analog filters (based upon an
In re Donaldson analysis), Fischler’s filters are analog
filters, but Abbott’s filter 48 is an adaptive digital filter.
(Reply brief-pages 3 and 4.)
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