This volume covers many aspects of the design of integrated circuits for fibre-optic receivers and other high-speed serial data links. Fundamental concepts are explained at the system level, circuit level and semiconductor device level. Techniques for extracting timing information from the random data stream are described in detail, as are all other aspects of receiver design. This book is organized into two parts. Part 1 covers the theory of communications systems as it applies to high-speed PAM (Pulse Amplitude Modulation) systems. The primary emphasis is on clock recovery circuits. Because theoretical concepts are generally grasped more easily by example, Part 2 is devoted to circuit design issues that illustrate example realizations of architectures described in Part 1. Part 2 presents the transistor-level design, and measured results, of fundamental building blocks and test circuits. For practising engineers who are more than just reporting on the results of specific circuits, this book is intended as a tutorial on the design of integrated high-speed broadband PAM data systems, such as: repeaters in long-haul, fibre-optic, trunk-lines transceivers for use in LANs and WANs; read channels for high-density data storage devices; and wireless communication handsets. This work may be used as a text for advanced courses in both analog circuit design and communication systems.