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Starting from the development of transistor technology to laser technology, the eldof solid state devices andtheircircuitapplications has advanced rapidly. The siliconbipolar junction transistor was rst applied to low frequency circuits. The subsequentadvances in materials science made it possible to fabricatecompound semiconductortransistors capable of operating at microwave frequencies and highspeeds. This presentedthe capability of applications in both analogue and digital circuits. At the sametime, the wide choice of high performance semiconductor materials also enabled thedevelopment of optoelectronic devices such as lasers and light-emitting diodes. Thecommunications industry continues to grow and diversify, thus necessitating the designof circuits which will satisfy the requirements of mobile telephones which are becomingmore and more sophisticated in their performance. Circuit design has applicationsin other areas such as optical communications.This book focusses o n high-speed electronics and optoelectronics where the devicesoperate at frequencies 1 GHz. It is presented in two parts with devices being discussedin the rst part and the circuit applications in the second part. In Part One,semiconductor devices fabricated in a variety of material systems - Si, III-V compoundsemiconductors and SiGe - are presented. We discuss the concepts and the fundamentalprinciples of operation. We do not attempt to present the latest results as they willalready be obsolete by the time the book is published. It is assumed that the reader hashad a course in fundamental solid state physics.Chapter 1 reviews semiconductor materials and physics. For the reader who is familiarwith the topics, this chapter will be a brief review. If not, the reader can go to thereferences section to get a detailed coverage of the topics. Semiconductor materials aredescribed followed by brief discussions of crystal structure and bonding. The sectionon quantum mechanics is inte nded to present only the important concepts and is nota comprehensive treatment of the subject. Semiconductor properties are described followedby types of semiconductors. Semiconductor junctions are treated in detail as they

Starting from the development of transistor technology to laser technology, the eldof solid state devices andtheircircuitapplications has advanced rapidly. The siliconbipolar junction transistor was rst applied to low frequency circuits. The subsequentadvances in materials science made it possible to fabricatecompound semiconductortransistors capable of operating at microwave frequencies and highspeeds. This presentedthe capability of applications in both analogue and digital circuits. At the sametime, the wide choice of high performance semiconductor materials also enabled thedevelopment of optoelectronic devices such as lasers and light-emitting diodes. Thecommunications industry continues to grow and diversify, thus necessitating the designof circuits which will satisfy the requirements of mobile telephones which are becomingmore and more sophisticated in their performance. Circuit design has applicationsin other areas such as optical communications.This book focusses o n high-speed electronics and optoelectronics where the devicesoperate at frequencies 1 GHz. It is presented in two parts with devices being discussedin the rst part and the circuit applications in the second part. In Part One,semiconductor devices fabricated in a variety of material systems - Si, III-V compoundsemiconductors and SiGe - are presented. We discuss the concepts and the fundamentalprinciples of operation. We do not attempt to present the latest results as they willalready be obsolete by the time the book is published. It is assumed that the reader hashad a course in fundamental solid state physics.Chapter 1 reviews semiconductor materials and physics. For the reader who is familiarwith the topics, this chapter will be a brief review. If not, the reader can go to thereferences section to get a detailed coverage of the topics. Semiconductor materials aredescribed followed by brief discussions of crystal structure and bonding. The sectionon quantum mechanics is inte nded to present only the important concepts and is nota comprehensive treatment of the subject. Semiconductor properties are described followedby types of semiconductors. Semiconductor junctions are treated in detail as they