CONFIGURABLE WRITE CURRENT OVERSHOOT SYSTEM FOR HDD WRITE DRIVER

摘要

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.

主权项

1. A switching element of a hard disk drive write driver integrated circuit that generates a write current signal for storing data to a hard disk drive, the circuit comprising:
a first input operable to receive a first input signal indicating the addition of a first overshoot current to a pattern of the write current signal; a second input operable to receive a second input signal indicating a first time interval associated with the pattern; and an overshoot component operable to add a first overshoot current to the pattern and further operable to further add the second overshoot current to the pattern, if the first time interval is longer than a first duration.