This course covers analog circuit analysis and design, focusing on the tools and methods necessary for the creative design of useful circuits using active devices. The class stresses insight and intuition, applied to the design of transistor circuits and the estimation of their performance. The course concentrates on circuits using the bipolar junction transistor, but the techniques that are studied can be equally applied to circuits using JFETs, MOSFETs, MESFETs, future exotic devices, or even vacuum tubes.