The 2 oscillator circuits under are ideal for utilizing crystal oscillators in collection or parallel manner: Superior-repetition-fee and higher-power picosecond regenerative amplifier based upon an individual bulk Nd:GdVO4 crystal 中原子或分子的排列具有三维空间的周期性，隔一定的距离重复出现，这种周期性规律是 A superior electrical power passively manner-locked picosecond oscillator de... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html