The two oscillator circuits below are appropriate for using crystal oscillators in sequence or parallel manner: Large-repetition-amount and higher-electricity picosecond regenerative amplifier based on just one bulk Nd:GdVO4 crystal A timing reference incorporating an individual-crystal-silicon micromechanical resonator with an excellent aspect of greater than a million in addition to a https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html