This book focuses on TIAs for optical receiver applications. It begins with an introduction to optical communication systems, signals, and standards. Then the book discusses the optical fiber and the relevant photodetectors. The author next covers the optical receiver at the system level, receiver impairments such as intersymbol interference (ISI), timing jitter, and nonlinear distortions. The book also examines the specifications of the TIA and illustrate them with example values from recent product data sheets.