Disk drive adaptable for multiple operating voltages

Details Disk drive adaptable for multiple operating voltages Disk drive adaptable for multiple operating voltages

1993-06-21

1999-10-26

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

360 60, 360 7804, 360 7806, 360 7807, G11B 1518

Patent

active

059738715

ABSTRACT:
A disk drive system that functions at various different power supply voltage levels includes a reset generator for resetting the disk drive in response to a predetermined reset condition dependent upon a drop in the power supply voltage. An adapter circuit coupled to the reset generator produces the reset condition by applying a multiplier to the supply potential of the system to establish a predetermined voltage at a reset node. The adapter circuit includes a switching means for selecting the multiplier based upon the particular mode of operation desired. The mode of operation is selected based upon an expected operating range of the power supply potential. A logic device is coupled to the adapter circuit to determine the particular mode of operation and for monitoring the current operating supply potential. The logic device is coupled to the switching means to change the multiplier in accordance with the particular mode of operation selected, as the supply potential varies through an expected operating range.

REFERENCES:
patent: 4636905 (1987-01-01), Morimoto et al.
patent: 4931889 (1990-06-01), Osafune
patent: 4991129 (1991-02-01), Swartz
patent: 5214316 (1993-05-01), Nagai

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