Intercircuit EMC - Design in early or risk finishing late and over budget

Poor circuit isolation is often the cause of electromagnetic interference (EMI) problems due to crosstalk and instability. Questions related to safety margins and isolation are examined. In the absence of an external environment capable of coupling through a circuit's enclosure, the sources become internal, and the intercircuit isolation issue arises. The underlying objective is low noise circuit design aimed at preventing intercircuit compatibility problems. It is, therefore, essential for electromagnetic compatibility (EMC) engineers to look for noise sources and susceptible points at the earliest design stage. Attention is given to oscillations and their source, the task of the circuit designer, the threat represented by various possible noise sources, the result of the design process, the use and abuse of design guidelines, a computer analysis of the circuit level for EMC, and a typical example presented to illustrate circuit level EMC analysis.