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Figure 7. Video Output Frequency Response
0
–4.0
–8.0
–12
–16
–20
0
Figure 9. FM Sound AFT Filter Voltage
20
V CC = 5.0 V
T A = 25 C
16
12
8.0
4.0
0
1.0
Figure 11. FM Sound Detector Relative Output, and
Signal to Noise Ratio versus Intercarrier Input Voltage
0
Output
–10
Level
–20
–30
–40
)
–50
S
N
–60
N
–70
–80
0.1
INTERCARRIER INPUT VOLTAGE, PIN 2 (mVrms)
6
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Elcodis.com
electronic components distributor
V CC = 5.0 V
f C = 45.75 MHz
T A = 25 C
Negative Video
Output Pin 5
4.0
8.0
12
VIDEO MODULATION FREQUENCY (MHz)
versus Internal Tuning Capacitance
Parasitic layout and
coil capacitance
must be considered.
2.0
3.0
SOUND AFT FILTER VOLTAGE, PIN 7 (V)
V CC = 5.0 V
f C = 5.5 MHz
Mod = 50 kHz Dev at 1.0 kHz
0 dB Output Level = 0.45 Vrms
T A = 25 C
1.0
10
MC44302A
V CC = 5.0 V
f C = 45.75 MHz
T A = 25 C
Positive Video
Output Pin 6
16
Figure 10. FM Sound Intercarrier Self–Tuning
Frequency Range versus External Tank Capacitance
7.0
6.5
6.0
5.5
V CC =
5.0
5.0 V
R28 = 10 k
4.5
Pin 7 = 1.5 V to 3.8 V
V in = 500 µVrms into Pin 2
4.0
Mod = 25 kHz Dev at 1.0 kHz
T A = 25 C
3.5
4.0
10
Figure 12. FM Sound Detector Frequency Response
4.0
0
–4.0
–8.0
V CC = 5.0 V
–12
PAL 1 Mode Selected
V in = 10 mVrms into Pin 2
–16
f C = 4.5 MHz
Dev = 25 kHz
–20
R L = 10 MΩ
C L = 10 pF
–24
T A = 25 C
–28
100
0.1
Figure 8. Vectorscope Display of
75% Saturated NTSC Color Bars
L3 =
15 µH
L3 =
22 µH
15
20
30
40
EXTERNAL TANK CAPACITANCE, C25 (pF)
C4 =
3.3 nF
C4 =
1.0 nF
1.0
10
INTERCARRIER MODULATION FREQUENCY, PIN 2 (kHz)
MOTOROLA ANALOG IC DEVICE DATA
Picture taken
without Figure 27
correction circuit
L3 =
10 µH
50
60 70
80
100
C4 =
0 pF
C4 =
100 pF
100
1000
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