Brushless motor driving circuit and portable terminal incorporating the same
First Claim
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; and
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.
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Accused Products
Abstract
A brushless motor driving circuit is disclosed which includes an initializing element setting an initial rotating speed, an oscillating element for generating a frequency corresponding to the initial rotating speed set by the initializing element, a frequency controlling element for causing the frequency generated by the oscillating element to change from the frequency corresponding to the initial rotating speed to a frequency corresponding to a constant rotating speed, a driving signal generating element for generating driving signals having a plurality of phases based on the generated frequency of the oscillating element, and a driving element for driving coils having a plurality of phases based on the driving signals having the plurality of phases generated by the driving signal generating element.
9 Citations
10 Claims
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1. A brushless motor driving circuit comprising:
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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; and
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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A portable terminal incorporating a vibrating motor for vibrating an enclosure and a motor driving circuit for driving said vibrating motor upon receipt of an incoming call, wherein said motor driving circuit comprises:
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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; and
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. - View Dependent Claims (8, 9, 10)
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Specification