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參數(shù)資料
| 型號： | TFS248D |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | 聲表面波濾波器 |
| 英文描述： | VI SAW濾波器(VI SAW Filter) |
| 中文描述： | 1 FUNCTIONS, 248.6 MHz, SAW FILTER |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 11K |
| 代理商： | TFS248D |
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______________________________________________________________________________________________________
VI TELEFILTER
Application Note TFS 248D
______________________________________________________________________________________________________
1. General
The filter has to be driven single ended. It is matched to 50
.
The termination impedances are :
Input: 630
|| -5,5 pF
Output: 600
|| -5,6 pF
2. Theoretical matching
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/best combination of standard values are given in brackets.
Circuit 1
L2
L1
6
1
version 1.1
01.11.00
-
1/2
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
Output
50 Ohm
C2
Input
50 Ohm
C1
SAW
2,3,4,5,7,8,9,10
L1 = 88 nH (82 nH / 56 nH+33 nH)
C1 = 15 pF
Circuit 2
L2 = 87 nH (82 nH / 56 nH+33 nH)
C2 = 15 pF
L3
Output
50 Ohm
L4
Input
50 Ohm
L2
L1
SAW
2,3,4,5,7,8,9,10
6
1
L1 = 56 nH
L2 = 27 nH
Both matching circuits are theoretically possible, but the first circuit is used in our final measurements.
The calculation was made without consideration of parasitics, so the elements which have to be used
on the PCB are slightly different from the stated.
L2 = 56 nH
L4 = 27 nH
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| TFS248E | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Application Note |
| TFS248E_0208 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Application Note |
| TFS248F | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
| TFS248H | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter specification |
| TFS248K | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
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