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−120
−110
−100
−90
−80
−70
−60
−50
−40
100 k 1 M 10 M
Harmonic Distortion − dB
f − Frequency − Hz
5th_HD
4th_HD
3rd_HD
3rd_HD
V
DD
= 3.3 V,
V
O
= 2 V
PP
,
R
L
= 800 Ω,
R
f
= 270 Ω,
G = 1
3rd_HD2nd_HD
Differential Input /
Differential Output
−120
−110
−100
−90
−80
−70
−60
−50
−40
−30
5th_HD
4th_HD
3rd_HD
2nd_HD
100 k 1 M 10 M
Harmonic Distortion − dB
f − Frequency − Hz
V
DD
= 3.3 V,
V
O
= 4 V
PP
,
R
L
= 800 Ω,
R
f
= 200 Ω,
G = 1
Differential Input /
Differential Output
−100
−90
−80
−70
−60
−50
−40
−30
−20
100 k 1 M 10 M
Harmonic Distortion − dB
f − Frequency − Hz
5th_HD
4th_HD
3rd_HD
2nd_HD
V
DD
= 3.3 V,
V
O
= 4 V
PP
,
R
L
= 800 Ω,
R
f
= 200 Ω,
G = 1
Single Input / Differential Output
Harmonic Distortion − dB
V
DD
= 3.3 V,
f = 1 MHz,
R
L
= 800 Ω,
R
f
= 200 Ω,
G = 1
V
O
− Output Voltage − V
−120
−110
−100
−90
−80
−70
−60
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
3rd_HD
2nd_HD
Differential Input /
Differential Output
THS4120
THS4121
SLOS319D – FEBRUARY 2001 – REVISED OCTOBER 2004
THS4121 THS4121
TOTAL HARMONIC DISTORTION HARMONIC DISTORTION
vs vs
FREQUENCY FREQUENCY
Figure 5. Figure 6.
THS4121 THS4121
HARMONIC DISTORTION HARMONIC DISTORTION
vs vs
FREQUENCY OUTPUT VOLTAGE
Figure 7. Figure 8.
6
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