Appeal No. 97-3451
Application 08/325,832
the comparator to a data channel decoder and also a servo signal
decoder.
Claims 8 and 14, however, are not so specific.
In independent claim 8, the thermometer code is used to
generate a peak-to-peak value for a pair of data bursts, and the
comparator circuit also generates a digital data channel value at
a data channel rate independent from a servo pattern rate.
In independent claim 14, the thermometer code is further
processed for providing decoded servo pattern burst binary data
numbers for controlling a servo, but the comparator is not
required to generate anything to send to a data channel decoder.
Finally, independent claim 22, on the other hand, does not
even require that the output from the comparator be a thermometer
code. According to this claim, it is only necessary that the
comparator provides an output to a data channel logic circuit and
a servo demodulator circuit.
Representative claim 1 is reproduced below:
1. A servo signal demodulator comprising:
a comparator circuit that receives an analog readback signal
transduced by a head from servo data and user data recorded in a
data track recorded on a storage medium and generates a
thermometer code output corresponding to the analog readback
signal;
a data channel decoder that receives data channel
thermometer code information from the comparator circuit at a
3
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Last modified: November 3, 2007