The key Drive control unit of the actuator Drive control unit and the keyboard musical instrument, actuator Drive control manner and the multiple actuators

摘要

PROBLEM TO BE SOLVED: To provide an actuator driving control device capable of suppressing the influence of a large spike noise and voltage drop when driving a plurality of actuators at the same time.;SOLUTION: On the basis of an instruction from a controller 240, a PWM signal generation circuit generates a PWM signal for driving a solenoid, and supplies the generated signal to the corresponding n-channel MOSFETs. When receiving an instruction from the controller 240 to simultaneously drive a plurality of the solenoids, the PWM signal generation circuit 250 sequentially changes over n-channel MOSFETs from the OFF state to the ON state at 2 s intervals by sequentially starting up a plurality of PWM signals to be supplied to the corresponding n-channel MOSFETs at 2 s intervals without starting them up at the same time.;COPYRIGHT: (C)2003,JPO