The phase-locked system is a closed loop automatic control system that can follow the frequency and phase of the input signals.
锁相系统是一个能够跟踪输入信号频率和相位的闭环自动控制系统。
The electromagnetic vibrational machine which has function of automatic frequency follow-up and stable amplitude was studied.
本文对具有自动频率跟踪和反馈稳幅功能的电磁振动机械进行了研究。
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