TFS225 Datasheet, PDF (3/5 Pages) Vectron International, Inc – VI TELE FILTER

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50 Ω test circuit and theoretical values of matching elements
Remark:
The values of the matching elements which are given below are calculated from the source and load impedance.
If the values of the matching elements are not equal to standard values the best standard values are given in
brackets. If standard matching elements instead of the exact values are used it can not be guaranteed that the
specification will be fulfilled.
Because these are theoretical values they have to be modified on PCB’s corresponding to the existing parasitics.
50 Ohm Test circuit 1
LB-IN
L1
8
1
C1
SAW
C2
L2
LB-OUT
L3
7
2
L4
4
3,5,6,9,10,11,12 ^L5
L1 = L2 = L3 = L4 = 62 nH
C1 = C2 = 1,2 pF
L5 = 150 nH
(68nH)
50 Ohm Test circuit 2
C1
LB-IN
8
1
L1
SAW
L2
7
2
C3
4
3,5,6,9,10,11,12 ^L3
C1 = C2 = C3 = C4 = 8 pF
L1 = L2 = 81 nH
L3 = 150 nH
(8.2 pF)
(82 nH)
C2
LB-OUT
C4
____________________________________________________________________________________________________
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