MC13135 MC13136
Figure 20a. Single Channel Narrowband FM Receiver at 49.7 MHz
MC13136
Figure 20.
V
CC
1.0
µ
H
24
23
1st LO
Varicap
2200 p
27 p
1
2
+
1.0
39 MHz
Xtal
1.0 k
0.001
0.01
22
21
5.0 p
62 pF
RF Input
50 Source
3
Buffered LO
Output
Ω
0.2 µH
150 pF
V
1
CC
0.01
0.1
5.0 k
4
5
20
Ceramic
Filter
10.7 MHz
2nd LO
120 p
V
2
CC
50 p
6
7
8
19
18
10.245 MHz
Xtal
0.1
360
Ceramic
Filter
455 kHz
9
AF
1.0 k
17
16
Recovered
Audio
Demod
10
11
0.15
Limiter
10 k
0.1
0.1
15
14
RSSI
Output
12
270 p
0.1
13
muRata
455 kHz
2.7 k
Resonator
CDB455C34
Figure 20b. Optional Audio Amplifier Circuit
1
2
8
7
4.7
+
V
CC
Speaker
10
+
3
4
6
5
+
10
Recovered
Audio
10 k
0.22
51 k
10
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA ]
