| 摘要 |
<p>An integrated circuit comprises a timekeeping circuit (1,2,3) for producing driving signals and a MOS transistor driving circuit (4) connected to receive the driving signals to control the flow of current from a battery to a stepper motor. A voltage booster circuit (11) produces a voltage which is greater than the open circuit voltage of the power source and an interface circuit (24) increases the voltage of the driving signals applied to the driving circuit (4) so that they also are greater than the open circuit voltage of the battery. </p> |
