Crystal oscillators are loosely divided with the frequency they perform at and whether they are essential oscillators—get the job done with the frequency marked about the can or at even multiples of that (overtone oscillators). Modeling of nonlinear micromechanical resonators and their simulation Together with the harmonic‐balance approach 中原子或分子的排列具有三维空间的周期性，隔一... https://guidemysocial.com/story4352897/a-review-of-bulk-crystal-oscillator