The 2 oscillator circuits under are suitable for employing crystal oscillators in series or parallel manner: Significant-repetition-price and substantial-power picosecond regenerative amplifier depending on only one 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 a https://social4geek.com/story4525538/not-known-details-about-bulk-crystal-oscillator