Appeal No. 2000-1259
Application 08/815,894
The claims
Claim 43 is representative:
43. A sampled amplitude read channel for reading
data recorded on a magnetic disk medium by
detecting digital data from a sequence of
discrete time sample values generated by
sampling pulses in an analog read signal from
a magnetic read head positioned over the
magnetic disk medium, the magnetic disk
medium comprising a plurality of concentric
data tracks wherein a data track comprises a
plurality of sectors, the sampled amplitude
read channel comprising:
(a) a discrete time timing recovery circuit
for synchronizing the discrete-time
[sic, discrete time] sample values to a
baud rate of the data recorded on the
magnetic disk medium;
(b) a discrete time gain control circuit for
adjusting an amplitude of the analog
read signal relative to a desired
partial response; and
(c) a discrete time sequence detector for
detecting an estimated data sequence
from the sequence of discrete time
sample values;
wherein the timing recovery circuit and the gain
control circuit are reconfigured before the
discrete time 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.
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