利用Protel连线电路， 设计一个调幅电路，来达到掌握该软件的目的，从而进一步了解和掌握该电路，达到本次课程设计的目的。-Connection using Protel circuit, design a modulation circuit, to achieve the purpose of the software control to further understand and grasp the circuit design to achieve the purpose of this course.