Write driver monitoring and detection

Details Write driver monitoring and detection Write driver monitoring and detection

2011-06-28

2011-06-28

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S068000

Reexamination Certificate

active

07969677

ABSTRACT:
Electronic circuitry and methods are disclosed for monitoring a portion of a write driver, for example, a steady state value of a write driver of a hard disk drive preamplifier. Based on a result of the monitoring, a condition, such as a fault, can be detected in the write driver. For example, apparatus for monitoring a write driver of a disk drive system comprises a comparator circuit coupled to an output of the write driver and configured to compare a value present at the output of the write driver with a reference value such that at least one condition associated with the write driver is detectable as a result of the comparison of the write driver output value and the reference value.

REFERENCES:
patent: 5729208 (1998-03-01), Ogiwara
patent: 6297921 (2001-10-01), Price et al.
patent: 6353914 (2002-03-01), Emerson et al.
patent: 6952316 (2005-10-01), Tretter
patent: 7206155 (2007-04-01), Kuehlwein et al.

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