Appeal No. 1999-1449
Application 08/640,351
values Xk to the baud rate, and subsequently to the channel
rate, as in Appellants’ invention. Therefore, we will not
sustain the Examiner’s rejection of claims 1 and 3-16.
We now, turn to the rejection of claims 17-18 under
35 U.S.C. § 103(a) as being unpatentable over Spurbeck and
Minuhin. Appellants argue on pages 8 and 9 of the Brief that the
references do not teach or suggest generating error values
synchronous to the channel rate.
Claim 17 recites a method for reading digital data from a
sequence of discrete time sample values (Xk) (25) generated by
sampling an analog signal (19) read from a read head positioned
over a magnetic medium (18). See figure 3, and specification,
page 1, lines 14-18. The claimed method comprises the step of
asynchronously sampling the analog read signal (19) to generate
asynchronous sample values (25). See figure 3, and
specification, page 14, lines 4-5. The claimed method further
comprises the step of adaptively equalizing the asynchronous
values (25) to generate equalized sample values (32) (Y(n))
according to a target response. See figure 3, and specification,
page 14, lines 4-9. The step of adaptively equalizing the
asynchronous values further comprises the step of computing an
error value, ek, (C112) as a function of a baud rate synchronous
11
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007