MC13135 MC13136
Figure 17a. Single Channel Narrowband FM Receiver at 49.7 MHz
MC13135
Figure 17.
V
CC
1.0
µ
H
24
23
1st LO
Varicap
2200 p
27 p
+
1.0
1
2
39 MHz
Xtal
1.0 k
0.001
22
21
5.0 p
62 pF
RF Input
3
Buffered LO
Output
50
Ω
Source
0.2 µH
150 p
V
1
CC
0.01
0.1
0.01
5.1 k
4
5
20
Ceramic
Filter
10.7 MHz
2nd LO
120 p
V
2
CC
50 p
6
7
19
18
10.245 MHz
Xtal
0.1
360
8
9
Ceramic
Filter
455 kHz
AF
1.0 k
0.15
17
16
Recovered
Audio
Demod
10
11
Limiter
10 k
0.1
0.1
RSSI
Output
15
14
12
0.1
39 k
13
455 kHz
Quad Coil
Figure 17b. PC Board Component View
NOTES:1. 0.2 µH tunable (unshielded) inductor
2. 39 MHz Series mode resonant
3rd Overtone Crystal
2
39 MHz
XT
3
1
1.0 k
3. 1.5 µH tunable (shielded) inductor
4. 10.245 MHz Fundamental mode crystal,
32 pF load
5. 455 kHz ceramic filter, muRata CFU 455B
or equivalent
6. Quadrature coil, Toko 7MC–8128Z (7mm)
or Toko RMC–2A6597HM (10mm)
7. 10.7 MHz ceramic filter, muRata SFE10.7MJ–A
or equivalent
2200p
27p
5p
62p
0.1
0.01
120p
1.0
+
10.245 MHz
XT
360
10k
4
1.0k
CF
7
5
455 KHz
0.1
0.15
0.1
0.22
10
+
+4.7
0.1
39K
MC34119
+10
Figure 17c. Optional Data Slicer Circuit
(Using Internal Op Amp)
V
CC
0.1
6
20 k
10 k
20 k
15
14
10 k
16
FSK Data
Output
V
in
(Pin 17)
0.001
1.0 M
8
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA ]
