U2860BB Datasheet, PDF (8/11 Pages) TEMIC Semiconductors – Dual-Channel FM Sound Demodulator for TV Systems

U2860B-B
0.5
0.4
0.3
0.2
0.1
0
123456789
95 10705
Frequency/ MHz
Figure 8. Total harmonic distortion
0
–10
–20
–30
–40
–50
–60
–70
–80
30 40 50 60 70 80 90 100 110 120
95 10703
IF input level/ dBmV
Figure 9. AM suppression
120.0
100.0
80.0
60.0
40.0
20.0 ^{Pin 10 open}
R 10 = 15 K
R 10 = 30 K
0.0
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
95 10707
Frequency/ MHz
Figure 10. VCO free-running frequency
3.0
input level = caption hold
2.5
2.0
1.5
1.0
123456789
95 10702
Frequency/ MHz
Figure 11. Capture and hold range
2
–2
–6
–10
–14
f = 5.5 MHz, FM-dev = +/–50 kHz,
fmod = 1 kHz, 50 ms de-emphasis
–18
26 28 30 32 34 36 38 40 42 44
95 10704
IF input level/ dBmV
Figure 12. Limiter characteristics
–50
–55
–60
–65
–70
–75
–80
2.0
95 10706
4.0
6.0
8.0
Frequency/ MHz
Figure 13. Signal to noise ratio
8 (11)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 17-Jun-96