Digital Signal Processing Reference
In-Depth Information
W
Figure 14.1
A trace of width
W
making a right-angled turn. The extra trace area (shown in white)
adds capacitance and inductance, which can cause refl ections at high frequency.
m = 0.8W = 6.4 mils
W = 8 mils
m = 2.25W = 10 mils
W = 8 mils
Figure 14.2
Mitering the trace outside edge at 45° to reduce excess capacitance. Optimal miter
length (
m
) is between 0.8
W
and 1.25
W
. Dimensions are shown for an 8-mil (0.21-mm)-wide trace.
0.8
W
[9] to 1.25
W
[6]. For instance,
m
for an 8-mil (0.21-mm)-wide trace would
be between 6.4 and 10 mils (0.17 mm and 0.25 mm) at an angle of 45°. In practice
