Disk drive partially autonomous preamplifier for write...

Details Disk drive partially autonomous preamplifier for write... Disk drive partially autonomous preamplifier for write...

2008-04-08

2008-04-08

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S068000

Reexamination Certificate

active

07355804

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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