TFS170N Datasheet, PDF (1/2 Pages) Vectron International, Inc – Application Note

Ltp:tft050
VI TELEFILTER
version 1.1
Application Note
TFS 170N
10.03.2005
1/2
General
The filter is single ended driven. It is matched to 50 Ω
The matching element values given below are valid theoretically. The matching elements
have to be optimised regarding the circuit and PCB design and existing parasites.
Theoretical matching
The measured terminating impedances of the filter are:
Input:
780 Ω || -7,9 pF
Output:
760 Ω || -7,9 pF
The values of the matching elements which are given below are calculated from the input
and output impedance.
10
L1
C1
5
L2
C2
L1 = 129 nH
C1 = 26 pF
1, 2, 3, 4, 6, 7, 8, 9
L2 = 130 nH
C2 = 27 pF
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