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| Ltp: tft032 version 2.0 05.04.2002 VI TELEFILTER Application Note TFS 248E - 1/1 1. General The filter is designed for single ended use at the input and at the output.It is matched to 50 . The terminating impedances are Input : 560 || - 5,9 pF Output: 500 || - 6,3 pF The matching element values given below are calculated from the terminating impedances. If the values of the matching elements are not equal to standard values the best standard values are given in brackets. Because these are theoretical values they have to be modified on PCB's corresponding to the existing parasitics. 2. Theoretical matching to 50 single ended L1 1 Input 50 Ohm L2 6 L3 SAW L4 Output 50 Ohm 2,3,4,5,7,8,9,10 The theoretical values of the stated elements are: L1 = 110 nH (100nH) L3 = 100 nH L2 = 170 nH (180 nH) L4 = 170 nH (180 nH) VI TELEFILTER Potsdamer Strae 18 D 14 513 TELTOW / Germany Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30 E-Mail: tft@telefilter.com Vectron International, Inc. 267 Lowell Road Hudson, NH 03051 / USA Tel: (603) 598-0070 Fax: (603) 598-0075 E-Mail: vti@vtinh.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. |
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