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參數(shù)資料
| 型號： | TFS228 |
| 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, 228.6 MHz, SAW FILTER |
| 文件頁數(shù)： | 1/1頁 |
| 文件大小： | 9K |
| 代理商： | TFS228 |
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______________________________________________________________________________________________________
VI
TELEFILTER
Application Note
______________________________________________________________________________________________________
1. General
The filter is single ended driven. It is matched to 50
The matching element values given below are valid theoretically. The matching
elements have to be optimised regarding the circuit and PCB design and existing
parasitics.
2. Theoretical matching
The balanced driven source and load impedances of the filter are:
Source:
220
|| -14.3 pF
Load:
225
|| -13.5 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
10
version 2.0
002.10.2000
TFS 228 - 1/1
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
598-0075
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)
E-Mail: vti@vtinh.com
L2
Output
50 Ohm
C2
Input
50 Ohm
C1
1,2,3,5,6,7,
4
8,9,11,12
L1 = 47 nH
C1 = 27 pF
L2 = 49 nH (47 nH)
C2 = 27 pF
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