本文介绍的正是应用锁相环对2FSK信号进行解调。本文首先对该系统的原理进行了分析，之后应用Matlab的simulink模块对该系统进行了仿真，最后对仿真结果仅进行了简单的分析。-This article describes what the application phase-locked loop 2FSK signal demodulation. Firstly, the principle of the system analysis, after application of Matlab simulink module of the system simulation, and finally a simple analysis of the simulation results only.