The 2 oscillator circuits below are suited to utilizing crystal oscillators in collection or parallel mode: Superior-repetition-charge and significant-energy picosecond regenerative amplifier determined by a single bulk Nd:GdVO4 crystal A timing reference incorporating only one-crystal-silicon micromechanical resonator with an excellent element of much larger than a million as well as https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html