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，为了将环形振荡出频率稳定在百万分之几以下精度，我们了一称为锁相环电路。

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.

利锁相环，我们得到了一速度极快频率发生，它产生信号恰好是可靠制造且温度稳定石英晶体 150 倍。