The two oscillator circuits below are suited to making use of crystal oscillators in collection or parallel method: Large-repetition-charge and large-electrical power picosecond regenerative amplifier determined by an individual bulk Nd:GdVO4 crystal A timing reference incorporating an individual-crystal-silicon micromechanical resonator with a quality element of much larger than a mi... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html