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參數資料
| 型號： | TFS70E |
| 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, 70.2 MHz, SAW FILTER |
| 文件頁數： | 1/2頁 |
| 文件大小： | 25K |
| 代理商： | TFS70E |
file: A-70E.doc
VI
TELEFILTER
Ltp: tft027
Version 1.0
19.05.2000
Application Note
TFS 70E - 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
Phone: (603) 598-0070 Fax: (603) 598-0075
e-mail: vti@vtinh.com
1. General
The filter is driven in an unbalanced way. It is matched to
50
The matching element values given below are theoretical calculations based on measured values for
termination impedance of test fixture (Q-value of matching elements is equal 30 ) and on PCB. If there are
parasitics on the customer PCB, the matching elements have to be optimised regarding the circuit and
PCB design.
We have tested on the PCB (tft027) one version of matching network ( scheme 1 ).
2. Theoretical matching
The unbalanced driven source and load termination impedances based on measured values of test fixture
( PCB – tft027, Q-value of matching elements is equal 30 ) for Scheme 1 are :
Frequency
Input termination impedance
Z
in
=
Z
14
70,2 MHz
50
- 30,80 pF
≡
34,22
+ j 23,24
Output termination impedance ( for Pin 6)
Z
out
=
Z
6
238,3
- 18,4 pF
≡
50
+ j 97
The values of the matching elements, which are given below, are calculated from the impedance for input
and output ( pin 6 ) on test fixture for different Q-value of the matching elements. If the values of the
matching elements are not equal to standard values, the best standard values are given in brackets.
The calculation was made with and without consideration of parasitics capacities : C
1p
and C
2p
.
Input (theor.)
Output (theor.)
Q-value
L
1
[nH]
C
1p
[pF]
C
2p
[pF]
∞
...30
167 [150; 180 ]
0
0
∞
...30
150
3,0
3,0
τ
- group delay ripple in PB = 1,0 MHz ;
- phase ripple in PB = 0,85 MHz ;
ILo – insertion loss ;
TTS – triple transit signal.
ILo
[dB]
- 5...-6
- 5...-6
τ
[ns]
L
2
[nH]
220
210 [220]
[degree]
3,6...4,9
3,6...4,9
110...200
110...200
Scheme 1
6
5
1 2 3 4 5
12 11 10 9 8
14
13
Z
in
=
Z
14
L
1
C
1p
50
Z
out
=
Z
6
L
2
C
2p
50
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|---|---|
| TFS70F1 | Filter Specification |
| TFS70F | Filter specification |
| TFS70G | Filter specification |
| TFS70H11 | Filter Specification |
| TFS70H12A | Filter Specification |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TFS70F | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter specification |
| TFS70F1 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
| TFS70G | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter specification |
| TFS70H11 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
| TFS70H12 | 制造商:VECTRON 制造商全稱:Vectron International, Inc 功能描述:Filter Specification |
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