The two oscillator circuits down below are ideal for applying crystal oscillators in sequence or parallel manner: Modeling of nonlinear micromechanical resonators and their simulation While using the harmonic‐stability system PDF Structure of resonators for the dedication with the temperature coefficients of elastic constants of monocrystalline silicon 晶体为无源的，一般是两个管脚，需... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html