Ltp: TFP7x5B

version 1.2

25.01.2007

Application Note

TFS 468F

2/2

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.

3. Matching on the PCB

For example: PCB with 50

Ω test circuit

L1 = 24 nH

L3 = 20 nH

L2 = -

L4 = -

C1 = 15 pF

C2 = 15 pF

All other components are 0

Ω jumpers.

The matching on the PCB does slightly differ from the theoretical matching. The reasons for

that are parasites of the PCB.

If the parasites on the customer board (mentioned parasites, additional parasites of active

parts) are different to this PCB the matching elements have to be slightly adjusted.

In case of questions please contact us to

SAW

10

4

1, 2, 3, 5, 7, 8, 9, 11

12

6

C

L

L

2

L3

C2

L

4