It is apparent that EMC problems potentially arise when we have the simultaneous presence of three parts, sources of interference, coupling mechanisms and systems which may fall victims (be susceptible) to interference. Remove or sufficiently control one or more of these three parts and then there is no EMC problem. In our series of articles on technical themes of importance to EMC we will from time to time focus on various aspects of each of these three EMC players and try to understand how to control them. In the current issue we focus on the Immunity of Integrated Circuits (ICs). Clearly, proper design of ICs can reduce their susceptibility to EMI and hence make them increasingly immune to the damaging effects of interference. This in turn means that in other important areas, e.g. control of EMI sources and of coupling paths, we may be able to have less stringent controls which may bring operational and/or cost benefits.Two papers are presented in this issue. The first by Redoute and Richelli introduces design guidelines for improving the ability of analog integrated circuits to sustain electromagnetic interference with examples of application to the design of operational amplifiers. The second paper by Fiori addresses the causes of failure of basic integrated circuits induced by radio frequency interference and the evaluation of their susceptibility. It is hoped that these articles will help the non-specialist to grasp the issues involved and what can be done during design to develop more immune products.Abstract -This paper describes the effect of EMI (electromagnetic interference) on analog integrated circuits, and introduces four design guidelines targeted at improving the susceptibility of analog integrated circuits to EMI. These guidelines are then applied to the practical design of operational amplifier topologies with a high degree of immunity to conductive EMI.Jean-Michel Redouté is with the