DRIVE CIRCUIT FOR COMPOSITE TYPE SOUNDING BODY

摘要

PROBLEM TO BE SOLVED: To provide a drive circuit which is capable of improving the vibration exciting force of a vibration motor and the sound pressure of an electromagnetic sounding body by efficiently driving a composite type sounding body having a vibration motor function and an electromagnetic type sounding body function. SOLUTION: A vibration motor input changeover switch 10, a vibration motor input decision circuit 20, a latch circuit 30 and a switching circuit 40 are connected. The output of the switching circuit 40 is connected to the input of a push-pull circuit 60. A resonance signal 70 and the signal obtained by inverting the output of the vibration motor input decision circuit 20 by an inverter 51 are inputted to an AND circuit 50 whose output is connected to together with the output of the switching circuit 40 through a flip-flop circuit 52 selectively parallel to an OR circuit 55 and an AND circuit 54. The output thereof is inputted to the push-pull circuit 60, by which the drive circuit of the composite type sounding body 66 having an armature mounted with two coils is constituted.