4

8

1

5

7

+V

S

6

L3

L2

23

FM2

TDA7212

22nF

18pF

39pF

22nF

1

2

3

47pF

38.3

MHz

22nF

15k

Ω

SFE

10.7

300

Ω

OUT

15pF

390pF

L1

49MHz

IN

3.3pF

L1 = L3 = TOKO E521LN 110033

7212-04

NB . : In this application it is advisable to decrease the gain of the front-end through a tapping on the L2 coil (3 turns of 12). So it can be ob-

tained: better selectivity, improve d intermodulation performance, better match ing with the following block that are IC’s design ed for double

conversion radio receivers.

FRONT-END CORDLESS APPLICATION

TDA7212

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