Dynamic magnetic information storage or retrieval – General processing of a digital signal
Reexamination Certificate
2009-12-15
2011-12-20
Wong, K. (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
C360S069000, C360S075000
Reexamination Certificate
active
08081395
ABSTRACT:
A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head, the control circuitry comprising a signal amplifier outputting a first signal comprising an offset voltage, the control circuitry operable to determine a state signal based on comparing the first signal to a reference signal, increase a M-bit digital count value in response to a first state of the state signal, decrease the M-bit digital count value in response to a second state of the state signal, and determine a first analog signal based on N bits of the digital count value, wherein the first analog signal adjusts the offset voltage and M>N.
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Western Digital Technologies Inc.
Wong K.
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