Crystal oscillators are loosely divided through the frequency they get the job done at and whether they are essential oscillators—perform at the frequency marked about the can or at even multiples of that (overtone oscillators). Modeling of nonlinear micromechanical resonators and their simulation While using the harmonic‐balance strategy 的很多特性，如温度稳定性，老化稳定性，等效电路... https://bookmarkstown.com/story19171560/everything-about-bulk-crystal-oscillator