The two oscillator circuits underneath are ideal for applying crystal oscillators in sequence or parallel manner: Significant-repetition-rate and substantial-ability picosecond regenerative amplifier according to one bulk Nd:GdVO4 crystal A timing reference incorporating a single-crystal-silicon micromechanical resonator with a top quality component of larger than one million plus a r... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html