一、振动元件振动元件有利用压电效应的压电振子和利用非尖锐谐振特性的机械振子。其中压电振子有两种,一种是历来都作为频率标准谐振元件、收发信机的频率控制元件或者滤波元件的石英振子;另一种是钛酸钡或锆钛酸铅等压电陶瓷,主要用作低于几百千赫滤波器的谐振器材料。机械振子是电磁式或压电 First, the vibration element The vibration element has a piezoelectric effect of the piezoelectric vibrator and the use of non-sharp resonance characteristics of the mechanical vibrator. There are two kinds of piezoelectric vibrators, one is the quartz oscillator that has always been used as a frequency standard resonance element, a frequency control element of a transceiver, or a filter element; the other is a piezoelectric ceramic such as barium titanate or lead zirconate titanate, Mainly used as a resonator material below several hundred kilohertz filters. Mechanical vibrator is electromagnetic or piezoelectric