CIRCUIT DEVICE FOR DISCHARGING BUFFER CAPACITOR USED FOR SUPPLYING HIGH VOLTAGE TO CONTROLLER, FOR EXAMPLE, CONTROLLER FOR CONTROLLING DRIVE OF PIEZO OUTPUT STAGE

摘要

PROBLEM TO BE SOLVED: To provide a circuit device for discharging a buffer capacitor (10) for supplying high voltage to a piezo output stage in a controller (14) for example. SOLUTION: An electronic switch element (Tx) is provided. By using the element (Tx), the buffer capacitor (10) is discharged and not charged again after the controller (14) is disconnected from a piezoelectric element (16) or the controller (14) is cut off. COPYRIGHT: (C)2003,JPO