Therefore, to stabilize the output frequency of a ring oscillator to  less than a few parts per million accuracy we use a circuit called a phase-locked loop.

因此，为了将荡器的输出频率稳定在百万分之几以下的精度，们用了一个称为锁的电路。

Using this phase-locked loop we have an  incredibly fast frequency generator producing a signal that is exactly 150 times that of a  reliably manufactured and temperature-stable quartz crystal.

利用这个锁，们得到了一个速度极快的频率发生器，它产生的信号恰好是可靠制造且温度稳定的石英晶体的 150 倍。