The 2 oscillator circuits down below are suitable for making use of crystal oscillators in sequence or parallel method: High-repetition-charge and superior-electrical power picosecond regenerative amplifier according to 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 high energy passively method-locked picosecond oscillator de... https://tornadosocial.com/story4483806/5-simple-techniques-for-bulk-crystal-oscillator