The 2 oscillator circuits beneath are well suited for making use of crystal oscillators in collection or parallel mode: High-repetition-charge and superior-energy picosecond regenerative amplifier determined by a single bulk Nd:GdVO4 crystal A timing reference incorporating an individual-crystal-silicon micromechanical resonator with an outstanding factor of greater than a million in https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html