The purpose of this book is to help the reader to understand off-the-shelf circuits and to enable him to design his or her own circuitry. The book is written for students, practicing engineers and scientists. It covers all major aspects of analog and digital circuit design. The book is a translation of the current 12th edition of the German bestsellerHalbleiter- Schaltungstechnik. PartI describes semiconductor devices and their behavior with respect to the models used in circuit simulation. This part introduces all major aspects of transistor level design (IC-design). Basic circuits are analyzed in ?ve steps: large-signal transfer characteristic, small-signal response, frequency response and bandwidth, noise and distortion. Digital circuits are covered starting with the internal circuitry of gates and ?ip-?ops up to the constructionofcombinatorialandsequentiallogicsystemswithPLDsandFPGAs.Design examples and a short form guide for the digital synthesis toolispLever are included on the CD enclosed. Part II is dedicated to board level design. The main chapters of this part describe the use of operational ampli?ers for signal conditioning including signal ampli?cation, ?ltering andAD-conversion. Further chapters cover power ampli?ers, power supplies and other important functional blocks of analog systems. The chapters are self-contained with a minimum of cross-reference. This allows the advanced reader to familiarize himself quickly with the various areas of applications. Each chapter offers a detailed overview of various solutions to a given requirement. In order to enable the reader to proceed quickly fromanideatoaworkingcircuit,wediscussonlythosesolutionswehavetestedthoroughly by simulation. Many of these simulation examples are included on the CD enclosed.