The two oscillator circuits underneath are ideal for working with crystal oscillators in series or parallel method: 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 quality element of much larger than one million along with https://bookmarknap.com/story9203076/a-secret-weapon-for-bulk-crystal-oscillator