The 2 oscillator circuits below are appropriate for using crystal oscillators in sequence or parallel mode: Significant-repetition-rate and substantial-ability picosecond regenerative amplifier depending on one 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 higher electrical power passively method-locked picosecond oscillator bas... https://letusbookmark.com/story20588553/the-2-minute-rule-for-bulk-crystal-oscillator