| 摘要 |
<p>The present invention has as its object to provide a motor driving apparatus which can stably rotate a motor having at least two poles at a high speed with a simple arrangement. To achieve this object, according to the present invention, a circuit for biasing one terminal of a driving coil of a motor to an intermediate potential of a power supply voltage is arranged, and a counterelectromotive voltage detection circuit for detecting a counterelectromotive voltage generated upon rotation of a rotor is arranged at the other terminal. A pulse signal to rotate the rotor is output on the basis of a detection signal output from the counterelectromotive voltage detection circuit. According to the present invention, the motor can be stably rotated at a high speed with a simple arrangement without impairing the structure of a conventional motor driving apparatus. The present invention has great effects on downsizing of motor driving apparatuses and a decrease in current consumption. <IMAGE></p> |
