Crystal oscillators are loosely divided through the frequency they operate at and whether they are elementary oscillators—function within the frequency marked within the can or at even multiples of that (overtone oscillators). Modeling of nonlinear micromechanical resonators as well as their simulation While using the harmonic‐stability system PDF 中原子或分子的排列具有三维空间的周期... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html