The two oscillator circuits underneath are ideal for working with crystal oscillators in series or parallel manner: Higher-repetition-fee and high-electrical power picosecond regenerative amplifier dependant on just one bulk Nd:GdVO4 crystal A timing reference incorporating an individual-crystal-silicon micromechanical resonator with an excellent factor of greater than a million in ad... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html