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TFS468F Datasheet(PDF) 1 Page - Vectron International, Inc |
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TFS468F Datasheet(HTML) 1 Page - Vectron International, Inc |
1 / 2 page Ltp: TFP7x5B version 1.2 25.01.2007 VI TELEFILTER Application Note TFS 468F 1/2 TELEFILTER GmbH Potsdamer Straße 18 D 14 513 TELTOW / Germany Tel: (+49) 3328 4784-0 / 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. 1. General The filter is single ended driven. It is matched to 50 Ω. The matching element values given below are valid on the test PCB. If the parasites 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 E08- series (European standard series with fixed tolerances). 2. Theoretical matching The terminating impedances of the filter are: source impedance: 1260 Ω || - 3,4 pF load impedance: 1020 Ω || - 4,0 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. 50 Ω test circuit L1 = 37,8 nH L2 = 34,1 nH C1 = 16,5 pF C2 = 16,5 pF C1 L1 SAW L2 C2 10 4 1, 2, 3, 5, 7, 8, 9, 11 6 12 |
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