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Brushless motor driving circuit and portable terminal incorporating the same

  • US 6,822,406 B2
  • Filed: 08/01/2002
  • Issued: 11/23/2004
  • Est. Priority Date: 08/14/2001
  • Status: Expired due to Fees
First Claim
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1. A brushless motor-driving circuit comprising:

  • initializing means setting an initial rotating speed;

    oscillating means for generating a frequency corresponding to said initial rotating speed set by said initializing means;

    frequency-controlling means for causing the frequency generated by said oscillating means to change from the frequency corresponding to said initial rotating speed to a frequency corresponding to a constant rotating speed;

    driving-signal-generating means for generating driving signals having a plurality of phases based on the generated frequency of said oscillating means;

    driving means for driving coils having a plurality of phases based on said driving signals having said plurality of phases generated by said driving-signal-generating means; and

    braking means for selectively blocking the supply of said generated frequency of said oscillating means to said driving-signal-generating means.

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