问题的引出应该说,外形很薄的压电扬声器可以为便携式电子设备提供高质量的音响,但它们需要在其两极加上峰峰值超过8V_(p-p)的电压信号。问题在于绝大多数便携式设备中,一般仅有一个3V的低压电源,采用常规式电池供电的放大器无法提供足够高的电压振幅来驱动压电扬声器。解决方案之一是采用图1中的IC1 MAX4410新型放大器电路,因在该电路 It should be said, the thin shape of the piezoelectric speakers can provide high-quality portable electronic devices, but they need to add bipolar peak voltage exceeds 8V_ (p-p) of the voltage signal. The problem is that in the vast majority of portable devices, there is typically only a 3V low-voltage power supply. Conventional battery powered amplifiers can not provide a high enough voltage amplitude to drive the piezoelectric speaker. One of the solutions is to use IC1 MAX4410 new amplifier circuit in Figure 1, because in this circuit