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利用锁相环路使键盘显示器的工作频率和电网同步,可以使显示器的画面清晰、稳定。本文对锁相环路和数字式鉴相器以及变容二极管控制的压控振荡器的工作原理、具体线路等作了叙述。
Phase-locked loop using the keyboard to monitor the operating frequency and grid synchronization, you can make the monitor screen clear and stable. This article describes the working principle of PLL and digital phase detector and varactor-controlled voltage-controlled oscillator, the specific lines and so on.