Invention Grant
- Patent Title: Additional overshoot current HDD write driver circuit
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Application No.: US14974125Application Date: 2015-12-18
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Publication No.: US09601152B2Publication Date: 2017-03-21
- Inventor: Marius V. Dina
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Lawrence J. Bassuk; Charles A. Brill; Frank D. Cimino
- Main IPC: G11B15/12
- IPC: G11B15/12 ; G11B20/10 ; G11B5/09 ; G11B5/02 ; G11B19/02 ; G11B5/012 ; G11B15/02

Abstract:
A hard disk drive write drive method and integrated circuit that provide a configurable overshoot current based on the length of the pattern in the write current signal that is being written to the hard disk by the write driver. The hard disk write driver adds a first overshoot current to all patterns in the write current signal and adds an additional second overshoot current to patterns in the write current signal shorter than a first duration. The hard disk drive write driver utilizes an H-bridge circuit configured to add the first overshoot current and the additional second overshoot current to the write current signal. The H-bridge circuit is comprised of four switching elements that are configured to generate a first overshoot current for all pattern transitions of the write current signal and generate a second overshoot current for pattern transitions shorter than the first duration.
Public/Granted literature
- US20160260455A1 CONFIGURABLE WRITE CURRENT OVERSHOOT SYSTEM FOR HDD WRITE DRIVER Public/Granted day:2016-09-08
Information query
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