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參數(shù)資料
| 型號(hào)： | TFS246H1 |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類(lèi)： | 聲表面波濾波器 |
| 英文描述： | VI SAW濾波器(VI SAW Filter) |
| 中文描述： | SAW FILTER |
| 文件頁(yè)數(shù)： | 1/1頁(yè) |
| 文件大小： | 17K |
| 代理商： | TFS246H1 |
Application Note for the SAW Filter TFS246H1
The filter is symmetrical, i.e. input and output are exchangeable with each other. But the
external coupling coil has to be connected between pin 3 and 4 in any case.
The filter has to be driven single ended.
The termination impedances are :
590
|| - 2.14 pF
This impedance is equal at the input and the output. It has to be realized at the point were the
filter is mounted. To match this impedance with the impedance of the system, a matching
circuit is required.
For the matching to 50 Ohm there can be used two different matching circuits:
50 Ohm Test circuit 1
L1
1
7
2,5,6,8,9,10,11,12
SAW
C1
C2
L2
L3
4
3
The theoretical values of the stated elements are:
L1 = L2 = 106 nH, C1 = C2 = 1.4 pF, L3 = 200 nH
50 Ohm Test circuit 2
1
7
2,5,6,8,9,10,11,12
SAW
C1
L1
C2
L2
L3
4
3
The theoretical values of the stated elements are:
C1 = C2 = C3 = C4 = 3.9 pF, L1 = L2 = 73 nH, L5 = 200 nH
The calculation was made without consideration of parasitics. The elements which have to be
used on the PCB are slightly different from the stated.
For example:
PCB with circuit 1
L1 = L2 = 100 nH, C1 and C2 can be left, L3 = 330 nH
If requested we can supply with such PCB and the measured S-parameters.
In case of questions please contact us to
VI TELEFILTER, Potsdamer Str. 18, 14513 Teltow, Germany
Tel +49 3328 4784 24, Fax +49 3328 4784 30, e-mail tft@telefilter.com
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| TFS246H2 | 制造商:VECTRON 制造商全稱(chēng):Vectron International, Inc 功能描述:SAW filter specification |
| TFS246H4 | 制造商:VECTRON 制造商全稱(chēng):Vectron International, Inc 功能描述:Filter Specification |
| TFS246H5 | 制造商:VECTRON 制造商全稱(chēng):Vectron International, Inc 功能描述:Filter Specification |
| TFS246K1 | 制造商:VECTRON 制造商全稱(chēng):Vectron International, Inc 功能描述:Filter specification |
| TFS246KC | 制造商:VECTRON 制造商全稱(chēng):Vectron International, Inc 功能描述:Filter specification |
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