Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2006-06-13
2006-06-13
Martin, David (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S269000, C318S270000, C318S271000, C318S272000
Reexamination Certificate
active
07061194
ABSTRACT:
A method and an apparatus for precisely controlling the rotation speed of a spindle motor in an optical system according to a given condition are provided. The method involves counting in response to a clock signal widths of first and second logic states of an input signal, which varies with rotation speed of the spindle motor, when an operation control command is issued, comparing a predetermined reference value with a count value for one check cycle, and outputting the comparison result; and controlling the constant linear velocity of the spindle motor in response to the comparison result.
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Jang Young-wook
Kim Je-kook
Glass Erick
Martin David
Mills & Onello LLP
Samsung Electronics Co,. Ltd.
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