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11-92
RF2908
Rev C1 010904
11
Differential Filter Design Information
Butterworth Response
RS
RS
C1
L
L
RL
RL
C2
C1
C1bw
1
2
--- 10
12
⋅⋅
2
π fc RL
⋅⋅ ⋅
-------------------------------------- C2
C2bw
1
2
--- 10
12
⋅⋅
2
π fc RL
⋅⋅ ⋅
-------------------------------------- L
Lbw RL 10
6
⋅⋅
2
π fc
⋅⋅
-----------------------------------
=
;
=
;
=
C1bw
4.5325 C2bw
;
13.5691 Lbw
;
0.1743
==
=
RS
125 RL
;
1000
RS
RL
-------
;
0.125
==
=
Differential LC Filter Component Values
(Butterworth Response)
1
10
100
1000
10000
100000
1.E+05
1.E+06
1.E+07
Frequency
C2 (pF)
C1 (pF)
L(
µH)
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