The 2 oscillator circuits down below are suitable for using crystal oscillators in series or parallel mode: Significant-repetition-fee and large-energy picosecond regenerative amplifier based on a single bulk Nd:GdVO4 crystal A timing reference incorporating only one-crystal-silicon micromechanical resonator with a high quality variable of bigger than one million and also https://social-lyft.com/story8811777/top-guidelines-of-bulk-crystal-oscillator