The two oscillator circuits underneath are ideal for applying crystal oscillators in sequence or parallel manner: Substantial-repetition-rate and large-electric power picosecond regenerative amplifier according to 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 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... https://one-bookmark.com/story18892261/the-2-minute-rule-for-bulk-crystal-oscillator