PURPOSE: To reduce in size a circuit configuration and to improve operability by providing drive circuits so as to bring dynamic characteristics of a plurality of stators in coincidence, controlling a plurality of motors and driving one rotor.

CONSTITUTION: A drive signal is generated from an oscillator 1 controlled by detectors 4, 5 in a first drive circuit oscillator 1, and amplified by drive signal amplifiers 2, 3 to apply a drive voltage to drive electrodes 11a, 11b of stators 11, 12. The signal from the oscillator 1 is so corrected by an output corrector 7 that the dynamic characteristics of the stators 11, 12 coincide with those of stators 21, 22 in a second drive circuit, amplified by the amplifiers 2, 3 to apply a drive voltage to stator drive electrodes 21a, 21b. A circuit configuration can be reduced in size without necessity of providing oscillators and detectors in a plurality of motors, respectively, and the number of regulating steps is reduced to improve operability. Since the signal is so corrected that the dynamic characteristics of the stators coincide, drive efficiency and control accuracy of the motor are improved.