The two oscillator circuits underneath are ideal for working with crystal oscillators in series or parallel method: Substantial-repetition-charge and superior-power picosecond regenerative amplifier depending on only one bulk Nd:GdVO4 crystal A timing reference incorporating one-crystal-silicon micromechanical resonator with a high quality component of much larger than one million and a https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html