U4255BM-M Datasheet, PDF (28/32 Pages) ATMEL Corporation – AM / FM RECEIVER IC

Figure 18. Selectivity
Integrated bandfilter BW setting: 120 kHz
desired signal level adjusted to 40 dB S/N without undesired signal
undesired signal level adjusted to 26 dB S/N
20
10
Pdes/Pundes
0
-10
-20
-30
-40
Adjacent
-50
-60
-70
-250 -200 -150 -100 -50 0 50 100
Frequency offset ( kHz )
150 200
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
250
28 U4255BM-M
4519C–AUDR–07/02