This manual is intended to accompany the authors' text, Microelectronic Circuits, (fourth edition). It has been thoroughly revised to make it more accessible, trimmer and easier to use. The authors' underlying philosophy complements this text by allowing students to learn-by-doing or explore the realm of real-world engineering based on the material from the main text. The equipment necessary to undertake the experiments is consciously kept at a minimum in order to take into account the possibility that poor resources may exist. The entire contents of the previous edition's lab manual is available via the WWW at: http: //www.sedrasmith.org.