Ultra-sonic motor driving circuit.

摘要

The present invention provides an ultra-sonic motor driving circuit having a control circuit (1) for supplying a drive enable signal and a battery voltage detecting circuit (3) for detecting a battery voltage. A drive duty generating circuit (2) is arranged to output a drive request signal intermittently in response to the drive enable signal and an output from the battery voltage detecting circuit. Driving means (4, 5, 6, 7) are responsive to the drive request signal for intermittently driving an ultra-sonic motor.