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| 型號(hào)： | 5962-9752001MPA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, CDIP8 |
| 封裝： | CERDIP-8 |
| 文件頁(yè)數(shù)： | 17/18頁(yè) |
| 文件大?。?/td> | 509K |
| 代理商： | 5962-9752001MPA |
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Typical Performance Characteristics (Continued)
Application Division
CLC449 Operation
CLC449 Extended Application Information
The following design and application topics will supply you
with:
A comprehensive set of design parameters and design
parameter adjustment techniques.
A set of formulas that support design parameter change
prediction
A series of common applications that the CLC449
supports.
A set of easy to use design guidelines for the CLC449.
Additional design applications are possible with the CLC449.
If you have application questions, call 1-800-272-9959 in the
U.S. to contact a technical staff member.
DC Gain (Non-inverting)
The non-inverting DC voltage gain for the configuration
shown in is:
The normalized gain plots in the Typical Performance
Characteristics section show different feedback resistors,
R
f, for different gains. These values of Rf are recommended
for obtaining the highest bandwidth with minimal peaking.
The resistor
t
in
Figure 1 provides DC bias for the
non-inverting input.
For A
v ≤5, calculate the recommended Rf as follows:
R
f
) 340 A
V xRi where Ri =45. For AV > 5, the minimum
recommended R
f is 100.
Select R
g to set the DC gain:
Accuracy of DC gain is usually limited by the tolerance of R
f
and R
g.
DC Gain (unity gain buffer)
Unity
gain
buffers
are
easily
designed
with
a
current-feedback amplifier as long as the recommended
feedback resistor R
f = 402 is used and Rg = ∞, i.e., open.
Parasitic capacitance at the inverting node may require a
slight increase of R
f to maintain a flat frequency response.
DC Gain (inverting)
The inverting DC voltage gain for the configuration shown in
Figure 2 is
Reverse Isolation (S
12)
|S
12
|(dB)
Frequency (Hz)
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
100M
200M
300M
400M
500M
DS012715-24
DS012715-25
FIGURE 1. Non-Inverting Gain
DS012715-28
FIGURE 2. Inverting Gain
CLC449
www.national.com
8
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