The two oscillator circuits underneath are ideal for using crystal oscillators in sequence or parallel mode: Large-repetition-level and higher-electricity picosecond regenerative amplifier based on an individual bulk Nd:GdVO4 crystal A timing reference incorporating only one-crystal-silicon micromechanical resonator with a high quality issue of larger sized than one million as well https://thesocialroi.com/story8722650/facts-about-bulk-crystal-oscillator-revealed