| 摘要 |
PURPOSE:To provide a resonance type buzzer driving device eliminating switching drive by an output transistor and suitable for an integrated circuit. CONSTITUTION:This device is provided with a signal synthesis circuit 12 synthesizing a tone signal A deciding a tone of a resonance type buzzer 11 and a resonance signal B with a prescribed frequency, and a voltage follower circuit 13 driving the resonance type buzzer 11 based on a synthesis signal C from the signal synthesis circuit 12. |
