This book is intended for the reader who whishes to gain a solid understanding of Phased Locked Loop fundamentals. It provides a unique balance that matches theoretical behavior with measured results. Engineers faced with real world design problems will find this book to be a valuable reference providing example implementations, underlying equations, and measured results. In this way, one can have confidence that the equation s truly model reality and can be trusted. The sixth edition is very similar to the fifth edition with the exception that several errata have been corrected.