ABSTRACT
Proper design for EMC requires that every effort is made to reduce the generation of electromagnetic interference and to improve immunity by proper layout and shielding techniques. After all reasonable efforts have been expended to address these issues, it may still be necessary to take specific measures to influence undesired signal flows by incorporating special circuits in selected locations. Examples of such circuits are filters, isolators, clamps, etc. In this chapter the nature and application of these circuits is described. Filtering is interpreted in its widest sense, namely, as a general signal conditioner that is used to modify a particular attribute of a signal. Thus, in addition to conventional filters, components such as common-mode chokes, baluns, isolating transformers, opto-isolators, etc., will also be considered.
