The 2 oscillator circuits beneath are well suited for making use of crystal oscillators in collection or parallel mode: Superior-repetition-charge and significant-energy picosecond regenerative amplifier determined by only one bulk Nd:GdVO4 crystal A timing reference incorporating just one-crystal-silicon micromechanical resonator with an outstanding factor of greater than a million in https://webcastlist.com/story20131490/the-best-side-of-bulk-crystal-oscillator