The 2 oscillator circuits under are suitable for using crystal oscillators in sequence or parallel mode: Significant-repetition-price and significant-power picosecond regenerative amplifier determined by only one bulk Nd:GdVO4 crystal A timing reference incorporating just one-crystal-silicon micromechanical resonator with an outstanding factor of bigger than a million in addition to a https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html