The 2 oscillator circuits below are ideal for employing crystal oscillators in collection or parallel mode: Substantial-repetition-price and high-ability picosecond regenerative amplifier based upon one bulk Nd:GdVO4 crystal A timing reference incorporating one-crystal-silicon micromechanical resonator with a high quality variable of more substantial than a million and a resonant freq... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html