| 摘要 |
<p>It is an object to make it possible to drive a motor at a high speed without causing any shift in the position of a hand. A memory stores a count value representing a target position to which a hand is to move; a rotation detecting circuit detects that a motor has rotated to output a rotation detection pulse signal and detects that the motor has not rotated to output a non-rotation detection pulse signal; a hand position counter counts the rotation detection pulse signal; anda control circuit controls the rotation of the motor with a normal pulse until the count value stored in the memory and the value counted by the hand position counter agree with each other. When a non-rotation counter counts a predetermined number of consecutive non-rotation detection pulse signals, the control circuit drives the motor with a corrective driving pulse having a great pulse width. <IMAGE></p> |
