Disk drive partially autonomous preamplifier for write current parameters
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United States of America Patent
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Apr 8, 2008
Grant Date -
N/A
app pub date -
Jun 2, 2005
filing date -
Aug 6, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A disk drive includes a rotatable data storage disk, and head, a controller, and a preamplifier. The head is configured to write data to and read data from the disk. The controller is configured to generate a write current command. The preamplifier includes a plurality of write current parameters, and is configured to select among the plurality of write current parameters based on the write current command from the controller, and to generate a write current having a shape that varies based on which of the write current parameters are selected. The write current is provided to the head to write a plurality of data bits on the disk.
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