Disk apparatus capable of determining failure of spindle motor

Details Disk apparatus capable of determining failure of spindle motor Disk apparatus capable of determining failure of spindle motor

2011-04-19

2011-04-19

Benson, Walter (Department: 2837)

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

C318S376000, C318S560000, C318S563000, C360S031000, C360S069000, C361S023000, C361S029000, C361S030000, C361S033000, C361S110000, C369S044220, C369S100000

Reexamination Certificate

active

07928681

ABSTRACT:
A control portion instructs supply of an offset voltage while a disk remains stopped at the time of start. While the disk remains stopped at the time of start, a differential operational amplifier detects a voltage difference between a first voltage supply line and a second voltage supply line. When the absolute value of the voltage difference output by the differential operational amplifier is equal to or lower than a prescribed threshold value, a failure determination portion determines that a spindle motor has shorted out.

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