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參數資料
| 型號： | TFS433D |
| 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： | SAW FILTER |
| 文件頁數： | 1/2頁 |
| 文件大小： | 13K |
| 代理商： | TFS433D |
Ltp: tft028
______________________________________________________________________________________________________
VI TELEFILTER
Application note
______________________________________________________________________________________________________
Version 1.1
01.11.00
TFS 433 D
1/2
1. General
The filter is single ended driven. It is matched to 50
The matching element values given below are valid on the test PCB. If the parasitics on the customer
PCB and on this PCB are different, the matching elements have to be optimised regarding the circuit
and PCB design.
The matching elements have been chosen from the E12- series (European standard series with fixed
tolerances) to get the best agreement between the PCB measurement and the measurement in a
reference test fixture.
Please note that the centre frequency of the filter will shift slightly if mechanical stress is applied to the
PCB.
2. Theoretical matching
The balanced driven source and load impedances of the filter are:
source impedance:
270
|| - 1.0 pF
load impedance:
270
|| - 1.0 pF
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 are given in brackets.
L1
______________________________________________________________________________________________________
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
SAW
1,2,3,6,7,8
5
10
L2
Output
50 Ohm
C2
Input
50 Ohm
C1
L1 = 39 nH
C1 = 1,8 pF
L2 = 39 nH
C2 = 1,8 pF
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| TFS433E | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
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| TFS433H | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter specification |
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