Appeal No. 97-3451
Application 08/325,832
(Cheung) (Filed Nov. 8, 1993)
The Rejection on Appeal
Claims 1-14 and 17-28 stand finally rejected under 35 U.S.C.
§ 103 as being unpatentable over Cheung and Garuts.
The Invention
Except for claim 22, which will be discussed separately, the
invention is directed to a servo signal demodulator having a
comparator circuit which generates a thermometer code.
Independent claims 1, 8, 14, 25 and 26 are based on this general
theme but are somewhat varied in content.
In independent claim 1, there is a data channel decoder that
receives data channel thermometer code from the comparator
circuit and generates data channel information, and a servo
signal decoder which demodulates servo signal thermometer code
from the comparator circuit. Similarly, in claim 25, there is a
data channel logic circuit which receives data channel
thermometer code from the comparator to generate a data channel
value, and a servo demodulator circuit which receives servo
signal thermometer code from the comparator to generate an output
burst signal for servo control. Likewise, claim 26 is a method
claim including a step for providing thermometer code output from
2
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