The 2 oscillator circuits below are suited to applying crystal oscillators in series or parallel method: Superior-repetition-rate and substantial-electric power picosecond regenerative amplifier dependant on a single 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 high ability passively manner-locked picosecond oscillator determin... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html