Floppy disk control circuit and floppy disk apparatus

Details Floppy disk control circuit and floppy disk apparatus Floppy disk control circuit and floppy disk apparatus

2007-06-19

2007-06-19

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C318S066000

Reexamination Certificate

active

11075787

ABSTRACT:
A floppy disk control circuit enables a floppy disk apparatus to operate at high speed while current consumption is suppressed to no more than 500 mA, i.e. the maximum allowed current of an apparatus using a USB interface. The floppy disk control circuit outputs a reference clock to a spindle motor drive circuit that drives the spindle motor in accordance with the reference clock to rotate a floppy disk. The floppy disk control circuit outputs a slow reference clock for a low rotational speed corresponding to the maximum allowed current at the commencement of the start-up of rotation of the floppy disk and outputs a fast reference clock for a high rotational speed after lapse of a predetermined time from the commencement of the start-up of rotation.

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Official Communication Issued in corresponding Japanese Patent Application No. 2004-069158, dated Jun. 27, 2006.

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