The two oscillator circuits under are suited to using crystal oscillators in series or parallel method: Modeling of nonlinear micromechanical resonators as well as their simulation with the harmonic‐harmony technique 的很多特性，如温度稳定性，老化稳定性，等效电路参数，容性负载要求等，都与切割方式密切相关�?石英 The kind of amplifier you may need will count on the frequency. Op-amps may... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html