Digital Signal Processing Reference
In-Depth Information
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5
1.0
1.5
2.0
2.5
v
in
(V)
(a)
3
2.75
2.5
2.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
−
0.25
−
0.5
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
Tx Input
Tx Output
Time (ns)
(b)
Figure 11-3
Example CMOS transmitter input-output characteristics: (a) voltage trans-
fer characteristic; (b) transient response driving a 1-pF load.
R
s
R
s
v
out
v
out
v
s
v
s
C
s
v
ss
(a)
(b)
Figure 11-4
Linear (Thevenin) equivalent model for a CMOS transmitter (a) basic
model; (b) with output capacitance,
C
S
.
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