Control circuits are an integral part of RF and microwave systems, as their compact size, high performance, and low cost have played a vital role in the development of cost-effective solutions and new applications during the past quarter century. This resource provides a comprehensive treatment of such circuits, including device operation and their models, basic circuit theory and designs, and applications. The unique features of this book include an in-depth and comprehensive study of control circuits, extensive design equations and figures, treatment of practical aspects of circuits, and descriptions of fabrication technologies. It provides RF and microwave engineers with a broad view of solid state control Circuits, including and comparisons of various technologies along with up-to-date information.