Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Reexamination Certificate
2006-08-01
2006-08-01
Sniezek, Andrew L. (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
C369S059190, C369S047480, C369S047280
Reexamination Certificate
active
07085085
ABSTRACT:
A first delay circuit receives a sampling clock obtained by multiplying detected frequency of reference clock patterns and outputs delay clocks from first delay stages, respectively. Recording frequency of the sampling clock is not obtained using the reference clock patterns but obtained using received addresses. A disk driving apparatus obtains the number of the first delay stages to be used which correspond to one cycle of the obtained recording frequency and necessary for phase adjustment of the sampling clock, and disables not-used first delay stages. Any of the delay clocks is selected and at least one of regenerating operation to read data from a disk media and recording operation to write data thereto is executed in synchronization with the selected delay clock. Consequently, the number of delay stages to be disabled can be obtained with simple control, reducing power consumption of circuits for adjusting phases of the sampling clocks.
REFERENCES:
patent: 6956708 (2005-10-01), Sutardja et al.
patent: 2004-087026 (2004-03-01), None
Arent Fox PLLC.
Sniezek Andrew L.
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