Covers the applications of the new MODFETs to all important areas of high speed and high frequency systems. It begins by describing the microwave and noise properties and the application to low noise amplifiers. The first section of the book ends with a description of performance when used as power amplifiers, as mixers or as oscillators. The second section deals with digital circuits and includes applications in dividers, multipliers, converters, multiplexers and memories. The volume concludes with applications to optoelectronic circuits. This book will be of special interest to engineers working in the following microwave and millimeter wave communication; radar systems design; high speed circuit design and high speed optical data transmission. It will also be of interest to graduate students.