MC1374
TV Modulator Circuit
The MC1374 includes an FM audio modulator, sound carrier oscillator, RF
oscillator, and RF dual input modulator. It is designed to generate a TV signal
from audio and video inputs. The MC1374’s wide dynamic range and low
distortion audio make it particularly well suited for applications such as video
tape recorders, video disc players, TV games and subscription decoders.
• Single Supply, 5.0 V to 12 V
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TV MODULATOR CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
Channel 3 or 4 Operation
Variable Gain RF Modulator
Wide Dynamic Range
Low Intermodulation Distortion
Positive or Negative Sync
14
Low Audio Distortion
1
Few External Components
P SUFFIX
PLASTIC PACKAGE
CASE 646
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC1374P
TA = 0° to +70°C
Plastic DIP
Figure 1. Simplified Application
V
Channel 3
4
+VCC = 12V
+
+
S1
C8
0.001
C2
56
5
+
+
C3
120
0.22µH
L3
C15
0.001
0.22µH
L4
Output
C14
0.01
U1
MC1374
3
12
13
1
C11
22
C12
47
C13
22
R9
560
11
2
L2
C5
0.001
R5
3.3k
10
R7
75Ω
9
4
C4
50
8
6
R2
470
R4
6.8k
3
t
7
L1
VPin 1
VPin 11
D1
MPN3404
5–25
C7
R3
470
C1
0.001
C9
0.001
R10
10k
R1
470
4
C16
47
R8
2.2k
14
R6
2.2k
Shaded Parts Optional
R14
56k
+
+
R12
180k
D2
1N914
C10
10µF
Video In
+
R13
30k
R11
220
Audio In
C6
1µF
L1 – 4 Turns #22, 1/4″ Dia.
L2 – 40 Turns, #36, 3/16″ Dia.
9–34
MOTOROLA ANALOG IC DEVICE DATA