The two oscillator circuits under are well suited for making use of crystal oscillators in collection or parallel manner: Substantial-repetition-amount and significant-ability picosecond regenerative amplifier based on a single bulk Nd:GdVO4 crystal A timing reference incorporating one-crystal-silicon micromechanical resonator with an outstanding aspect of more substantial than a mill... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html