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參數(shù)資料
| 型號(hào)： | TFS325 |
| 廠商： | Vectron International, Inc. |
| 英文描述： | VI SAW濾波器(VI SAW Filter) |
| 中文描述： | 六聲濾波器（SAW濾波器六） |
| 文件頁數(shù)： | 1/3頁 |
| 文件大小： | 19K |
| 代理商： | TFS325 |
Ltp: tft031
______________________________________________________________________________________________________
VI
TELEFILTER
Application Note
______________________________________________________________________________________________________
1. General
The filter is symmetrical, i.e. input and output are exchangeable with each other.
The filter can be unbalanced and balanced driven. In production the filter is tested under
unbalanced driven conditions. The crosstalk level can be reduced if the filter is balanced
driven at one or both ports.
The termination impedances for input and output are :
The value for the coupling coil is:
These data are measured data from golden test fixture. This impedance is equal for the input
and the output. It has to be realised at the point were the filter is mounted. To match this
impedance to the impedance of the system a matching circuit is required.
2. Theoretical matching
For the matching of termination impedances to 50 Ohm there can be used two different
matching circuits
50 Ohm Test circuit 1
version 1.0
13.10.2000
TFS 235
1/3
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
E-Mail: tft@telefilter.com
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.
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: vti@vtinh.com
770 Ohm || -1.9 pF .
145 nH.
The theoretical values of the stated elements are:
L1 = L2 = 128.2 nH,
C1 = C2 = 1.43 pF,
L3 = 145 nH
1
7
3, 5, 6, 9, 10, 11, 12
50 Ohm
50 Ohm
SAW
C1
L1
C2
L2
4
2
8
L3
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| TFS325C | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter specification |
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| TFS326A | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
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