TFS433K_01 Datasheet, PDF (1/1 Pages) Vectron International, Inc – Application Note

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version 1.0
09.02.2001
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VI TELEFILTER
Application Note
TFS 433K
1/1
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1. General
The filter is designed for single ended use at the input and at the output.It is matched
to 50 Ω.
The terminating impedances are
Input :
370 Ω || -0,9 pF
Output:
370 Ω || -0,9 pF
2. Theoretical matching to 50 Ω single ended
The matching element values given below are calculated from the terminating
impedances. If the values of the matching elements are not equal to standard values
the best standard values are given in brackets. Because these are theoretical values
they have to be modified on PCB’s corresponding to the existing parasitics.
Input
50 Ohm
L1
L2
SAW
C1
C2
Output
50 Ohm
L1 = 47 nH
C1 = 1,5 pF
L2 = 47 nH
C2 = 1,5 pF
VI TELEFILTER
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Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: [phone] Fax: [phone]
E-Mail: [e-mail]
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.