參數(shù)資料
型號(hào): ADL5380ACPZ-WP
廠商: ANALOG DEVICES INC
元件分類: 調(diào)制器/解調(diào)器
英文描述: 400 MHz - 6000 MHz RF/MICROWAVE I/Q DEMODULATOR
封裝: 4 X 4 MM, ROHS COMPLIANT, MO-220-VGGD-8, LFCSP-24
文件頁(yè)數(shù): 22/36頁(yè)
文件大?。?/td> 833K
代理商: ADL5380ACPZ-WP
ADL5380
Rev. 0 | Page 29 of 36
As the load impedance of the filter increases, the filter design
becomes more challenging in terms of meeting the required
rejection and pass band specifications. In the previous W-CDMA
example, the 500 Ω load impedance resulted in the design of a
sixth-order filter that has relatively large inductor values and small
capacitor values. If the load impedance is 200 Ω, the filter design
becomes much more manageable. Figure 92 shows a fourth-order
filter designed for a 10 MHz wide LTE signal. As shown in Figure 92,
the resultant inductor and capacitor values become much more
practical with a 200 Ω load.
2.2H
100p
F
1.5H
22p
F
200
50
07
58
5-
09
1
Figure 92. Fourth-Order Low-Pass LTE Filter Schematic
Figure 93 and Figure 94 illustrate the magnitude response and
group delay response of the fourth-order filter, respectively.
–35
–25
–15
–5
–30
–20
–10
0
–40
5
FREQUENCY (MHz)
F
RE
Q
UE
NCY
RE
S
P
O
N
S
E
(
d
B
)
40
35
30
25
20
15
10
5
0
07
58
5-
09
2
Figure 93. Fourth-Order Low-Pass LTE Filter Magnitude Response
5
10
1520253035
40
0
10
20
30
40
50
0
60
FREQUENCY (MHz)
GR
OU
P
D
E
L
A
Y
(
n
s)
07
58
5-
0
93
Figure 94. Fourth-Order Low-Pass LTE Filter Group Delay Response
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