Title: Motor controlling circuit and method
Application Number: 200610163131 Application Date: 2006.11.30
Publication Number: 1988367 Publication Date: 2007.06.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02P25/16;H02P6/00
Applicant(s) Name: NEC Electronics Corp. Address:
Inventor(s) Name: Watanabe Shinpei
Attorney & Agent: lujin hua
Abstract:
    A motor control circuit includes: a detector outputting a detection signal in accordance with the motor rpm; a counter counting the number of clocks in accordance with a rotational cycle represented by the detection signal; a controller counting a DC motor based on the count value; and a divider dividing a frequency of a basic clock based on a preset division value to generate a counting clock. The divider generates a counting clock having a frequency corresponding to a rotational cycle, and the counter counts the number of counting clocks.
Time: 9
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