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參數(shù)資料
| 型號： | OPA660AU |
| 元件分類： | 跨導(dǎo)放大器 |
| 英文描述： | Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER AND BUFFER |
| 中文描述： | 寬帶運算跨導(dǎo)放大器和緩沖 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 358K |
| 代理商： | OPA660AU |
12
OPA660
20
20
20
25
V
OUT
V
IN
R
1
40.2
R
2
100k
CCII
B
E
C
2
8
3
D
1
, D
2
= 1N4148
R
Q
= 1k
The OTA amplifier works as a current conveyor
(CCII) in this circuit, with a current gain of 1.
R
1
and C
1
set the DC restoration time constant.
D
1
adds a propagation delay to the DC restoration.
R
2
and C
1
set the decay time constant.
OPA650
C
100pF
D
1
D
2
+1
5
6
Use low-inductance components. Some film resistors are
trimmed with spiral cuts which increase inductance.
Use surface-mount components—they generally provide
the lowest inductance.
A resistor (25
to 200
) in series with the buffer and/or
B input may help reduce oscillations and peaking.
Use series resistors in the supply lines to decouple mul-
tiple devices.
OTA
V
I
B
E
2
C
V
O
R
5
22
3
8
5
6
R
4
200
R = 250 (I 20mA)
G = 1 + R
4
R
5
+1
≈
R
2
R
1
47
C
1
56
FIGURE 10. Current-Feedback Amplifier Frequency
Response, G = 10.
FIGURE 9. Current-Feedback Amplifier.
15
10
5
0
–5
–10
–15
–20
–25
–30
1M
10M
100M
1G
Frequency (Hz)
O
OPA660 CURRENT-FEEDBACK
I
Q
= 20mA R
1
= 47
R
2
= 56
R
4
= 200
R
5
= 22
Gain = 10
20
2.8Vp-p
0.6Vp-p
1.4Vp-p
5Vp-p
0.2Vp-p
–3dB Point
100k
FIGURE 12. High Speed Current Driver (bridge combina-
tion for increased output voltage capability).
FIGURE 13. Cable Amplifier.
OTA
V
I
B
E
2
C
V
O
R
E
42
3
8
5
6
+1
150
150
50
R = 250 (I 20mA)
R
L
G = R + r
E
≈
R
L
E
OTA
B
C
3
8
+IN
2
E
OTA
B
E
3
2
–IN
C
8
R
E
Tuning Coil
Magnetic Head
Driver Transformer
I
O
FIGURE 11. DC Restorer Circuit.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA660AU/2K5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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