Appeal No. 1997-4445
Application 08/305,076
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 6-14.
We affirm-in-part and enter a new ground of rejection.
BACKGROUND
The invention is directed to a floppy disk drive which is
capable of suppressing voltage of a counter electromotive
force generated by self-induction of an internal coil of a
stepping motor, reducing the noises generated in a power line,
and thereby preventing irregular rotation of the stepping
motor.
Claim 6 is reproduced below.
6. A floppy disk drive apparatus comprising:
a head carriage for carrying a head for magnetically
recording data on a floppy disk;
a stepping motor for moving said head carriage in a
radial direction with respect to said floppy disk;
an exciting current supplying circuit for supplying
an exciting current to said stepping motor to cause said
stepping motor to rotate by a predetermined rotation
angle in accordance with a step signal applied to said
exciting current supplying circuit; and
a control circuit for controlling said exciting
current supplying circuit, when the exciting current
supplied to said stepping motor is cut off at a
termination of an enable excitation time interval
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