锁相环经典书籍Message from the Author I first became familiar with PLLs by working for National Semiconductor as an applications engineer. While supporting customers, I noticed that there were many repeat questions. Instead of creating the same response over and over, it made more sense to create a document, worksheet, or program to address these recurring questions in greater detail and just re-send the file. From all of these documents, worksheets, and programs, this book was born. Many questions concerning PLLs can be answered through a greater understanding of the problem and the mathematics involved. By approaching problems in a rigorous mathematical way one gains a greater level of understanding, a greater level of satisfaction, and the ability to apply the concepts learned to other problems. Many……