The PLL part, made of PD, Loop Filter, Voltage Control Oscillator, is the key circuit of the system to produce steady and continuous frequency scanning signal.是什么意思_The PLL part, made of PD, Loop Filter, Voltage Control Oscillator, is the key circuit of the system to produce steady and continuous frequency scanning signal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句