The 2 oscillator circuits beneath are suited to utilizing crystal oscillators in collection or parallel mode: Significant-repetition-price and substantial-power picosecond regenerative amplifier depending on one bulk Nd:GdVO4 crystal A timing reference incorporating a single-crystal-silicon micromechanical resonator with a high quality component of larger sized than one million plus a... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html