U4311B-FS データシートの表示（PDF） - Atmel Corporation
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U4311B-FS Datasheet PDF : 13 Pages
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U4311B-FS
C2
100 nF
R1
8.2 kW
R15
22 kW
VS
C7
10 mF
R14
22 kW
C8
100 nF
C9
10 mF
20 19 18 17
Filter TOKO A119ACS-19000Z
(L = 2.2 mH, C = 100 pF)
C10
22 pF
16 15
R9
56 W
R10
300 W
R8
100 kW
IF input
C11
10 nF
Wake-up
out
14 13 12
11
R11
10 kW
C1
10 nF
R2
30 kW
C3
1.5 nF
R6
100 kW
R5
100 kW
1
2
3
4
5
6
7
8
C4
100 nF
R12
C12
Wake up
100 kW 220 nF
Data filter
output
22Rk7W
R3
220 kW
C5
220 nF
R13
10 kW
R4
100 kW
Figure 26. FM test circuit with 2-kHz Bessel lowpass data filter
9 10
Comparator
output
C6
220 nF
10
0
–10
–20
–30
–40
–50
–60
–70
0
95 10291
S+N
N
20
40
60
80 100
IF-input level ( dmBV )
Figure 27. Signal-to-noise ratio FM; deviation 22.5 kHz
2.5
C10 = 22 pF
2.0
1.5
1.0
C10 = 47 pF
0.5
0.0
10.3
10.5
10.7
10.9
11.1
95 10290
Frequency ( MHz )
Figure 28. FM-discriminator characteristic
Rev. A3, 28-Sep-00
11 (13)
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