Digital Signal Processing Reference
In-Depth Information
1.3
Worst Case 1
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
−
0.1
Worst Case 0
−
0.2
−
0.3
0123456789 0 1 2 3 4 5 6
Time (ns)
(c)
1.2
1.1
V
OH
@ dc
1.0
0.058 V
0.9
0.8
0.7
0.794 V
0.6
V
ref
0878 ns.
0.5
0.4
0.3
0.2
0.1
0.0
0.058 V
−
0.1
−
0.2
−
0.3
Time (ns)
(d)
Figure 13-25
(
Continued
)
pattern for a zero (1000100010000). The voltage value of the worst-case zero is
0
.
055 V
0
.
058 V.
We show the waveforms for both worst-case patterns in Figure 13-25c, and
the resulting eye diagram in Figure 13-25d. From the eye diagram we see that
+
0
.
003 V
+
0
.
0001 V
=
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