AD8055/AD8056
5
4
3
2
增益 - 分贝
R
S
R
F
R
L
V
IN
50
R
C
V
OUT
–50
V
OUT
= 100mV的P-P
R
L
= 100
G = +2
R
F
= 402
G = +1
R
F
= 0
R
C
= 100
谐波失真 - dBc的
–60
V
OUT
= 2V峰 - 峰值
G = +2
R
L
= 100
2ND
1
0
–1
–2
–3
–4
–5
0.3M
1M
G = +10
R
F
= 909
G = +5
R
F
= 1000
10M
100M
频率 - 赫兹
–70
–80
3RD
–90
1G
–100
10k
100k
1M
频率 - 赫兹
10M
100M
图9.小信号频率响应，
G = +1, G = +2, G = +5, G = +10
图12.失真与频率的关系
5
4
3
2
V
OUT
= 2V峰 - 峰值
R
L
= 100
–50
V
OUT
= 2V峰 - 峰值
G = +2
R
L
= 1k
–60
增益 - 分贝
1
0
–1
–2
–3
–4
–5
0.3M
1M
G = +10
R
F
= 909
G = +5
R
F
= 1000
10M
100M
频率 - 赫兹
G = +2
R
F
= 402
G = +1
R
F
= 0
失真 - dBc的
–70
–80
2ND
–90
3RD
1G
–100
10k
100k
1M
频率 - 赫兹
10M
100M
图10.大信号频率响应，
G = +1, G = +2, G = +5, G = +10
图13.失真与频率的关系
0.5
0.4
0.3
0.2
输出 - 分贝
–40
V
OUT
= 100mV的
G = +2
R
L
= 100
R
F
= 402
失真 - dBc的
–50
G = +2
R
L
= 1k
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0.3M
–60
2ND
–70
–80
3RD
–90
1M
10M
100M
频率 - 赫兹
1G
0
0.4
0.8
1.2
1.6
2.0 2.4
V
OUT
- V P-P
2.8
3.2
3.6
4.0
图11. 0.1 dB平坦度
图14.失真与V
OUT
@ 20MHz的
版本B
–5–
AD [ ANALOG DEVICES ]
