STV8223B Datasheet, PDF (8/10 Pages) STMicroelectronics – MULTISTANDARD VIDEO AND SOUND IF SYSTEM WITH AUDIO AND VIDEO SWITCHES

STV8223B
Figure 21 : AFC Voltage Pin 2 vs IF Frequency
8
7
6
5
4
3
2
1
0
38.55
Current Conversion
with 100kΩ/100kΩ Bridge
38.75 38.95 39.15
IF FREQUENCY (MHz)
39.35
Figure 23 : Tuner AGC Output Current vs V_IN
(R24 is external adjustment Pin 24)
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
10^-1
R24 = 1kΩ
R24 = 3kΩ
R24 = 5kΩ
1
10
10²
10³
V_IN (mV_RMS)
Figure 25 : Black and White Noise Inverter
V₃ (V)
4.85
4.2
3.6
2.5
1.9
1.3
Figure 22 : Volume Control Attenuation vs V₁₃
0
-10
-20
-30
-40
-50
-60
-70
-80
1.0
2.0 3.0
4.0 5.0
V13 (V)
Figure 24 : Video Signal to Noise Ratio (Pin 3)
as a function of IF Input Signal
(Pins 19-20) Weighted CCIR-567
80
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
V_IN (mV_RMS)
White Spike Noise Clamp
Top White
White Noise Level Insertion
Black Noise Level Insertion
Top Synchronization
Black Spike Noise Clamp
t
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