多个基本的数电实验工程，代码及分析都有，是初学者的好材料-More than a few basic electrical test engineering, and analysis of the code has is a good material for beginners

Smith Chart: The Smith chart, invented by Phillip H. Smith (1905-1987),is a graphical aid or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission

Socket Programming Kameswari Chebrolu Dept. of Electrical Engineering, IIT Kanpur