Intel Embedded Intel486 Hardware Reference Manual page 312

EMBEDDED Intel486™ PROCESSOR HARDWARE REFERENCE MANUAL
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Figure 10-23. Removing Closed Loop Signal Paths
Minimizing EMI involves first examining the circuit's interconnection with its nearest neighbors
since parallel and adjacent lines can interact and cause EMI. It is necessary to maximize the dis-
tance between adjacent parallel wires.
10.3.3.3 Electrostatic Interference
We have discussed two types of coupling, namely inductive and radiative coupling which are re-
sponsible for creating electromagnetic interference. A third, known as capacitive coupling, oc-
curs when two parallel traces are separated by a dielectric and act as a capacitor. According to the
standard capacitor equation, the electric field between the two capacitor surfaces varies with the
permittivity of the dielectric and with the area of the parallel conductors.
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