Filter
Top Products
PHYSICAL DESIGN AND DEBUGGING
The design of effective decoupling and bypass schemes centers on maximizing the charge
stored in the circuit bypass loops while minimizing the inductances in these loops. Some
other precautions that can minimize the EMI are
as
follows:
• Running a ground line in between two adjacent signal lines. The extra line should be
grounded at both ends.
• The address and data buses can also be separated
by
ground lines. This technique
may be expensive due to large number
of
address and data lines.
• Removing closed-loop signal paths that can create inductive noise (as shown
III
Figure 11-23).
Minimizing cross-talk involves first examining the circuit's interconnection with its near-
est neighbors since parallel and adjacent lines can interact and cause
EM!.
It
is
neces-
sary to maximize the distance between adjacent parallel wires.
01
02
03
231732i11-23
Figure 11-23. Closed Loop Signal Paths are Undesirable
11-27