| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor control circuit that can selectively conduct many gradual rotation drive operations of a motor with small number of output ports, by employing a circuit configuration that changes the control voltage into a step form by the control signals of the output ports. SOLUTION: The motor control circuit includes a control voltage setting circuit 20, which outputs the predetermined control voltage Vi by the control signals from the output ports T1 to Tn of a microcomputer 10, and a motor drive circuit 30 which outputs a motor drive voltage Vo from the control voltage Vi output from the control voltage setting circuit 20, wherein the motor control circuit 40 is such that the control voltage Vi is changed into a step form by the control signals of the output ports T1 to Tn. COPYRIGHT: (C)2007,JPO&INPIT
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