參數(shù)資料
型號(hào): UPC1830GT
廠商: NEC Corp.
英文描述: FILTER-CONTAINING VIDEO CHROMA, SYNCHRONIZING SIGNAL PROCESSING LSI COMPATIBLE WITH NTSC/PAL SYSTEM
中文描述: 過(guò)濾含視頻色度,同步信號(hào)處理LSI兼容NTSC制式/ PAL制
文件頁(yè)數(shù): 17/44頁(yè)
文件大小: 338K
代理商: UPC1830GT
μ
PC1830
17
Figure 5-4. Color Control Characteristic
(a) NTSC mode
(b) PAL mode
(4) Tint control circuit
Controls the phase of a color difference signal whose amplitude is adjusted by the color control circuit, in a range of
±
45
°
according to the voltage of the tint control pin (pin 21), and adjusts tint on the screen.
Table 5-2 shows the demodulation angle and demodulation ratio in each mode and Figure 5-5 shows the control
characteristic.
Table 5-2. Demodulation Angle and Demodulation Ratio when
Tint Control Pin (Pin 21) Voltage = 2 V (TYP.)
Mode
Demodulation angle (
R-Y)
Demodulation ratio (R-Y/B-Y)
NTSC
105
°
(TYP.)
0.75 (TYP.)
PAL
90
°
(TYP.)
0.61 (TYP.)
Figure 5-5. Tint Control Characteristic
(a) NTSC mode
(b) PAL mode
0.8
0.1
0
1
2
3
4
5
0.2
0.3
0.4
0.5
0.6
0.7
B
p
)
Color control pin voltage (V)
V
CC
= 5 V
400 mV
p-p
stair step B-Y input
Tint control pin voltage: 2 V
0.9
1.0
0.8
0.1
0
1
2
3
4
5
0.2
0.3
0.4
0.5
0.6
0.7
B
p
)
Color control pin voltage (V)
V
CC
= 5 V
400 mV
p-p
stair step B-Y input
Tint control pin voltage: 2 V
0.9
1.0
+90
_900
1
2
3
4
5
_45
0
+45
B
Tint control pin voltage (V)
400 mV
p-p
stair step R-Y, B-Y input
Tint control pin voltage: MAX.
V
CC
= 5 V
+90
_900
1
2
3
4
5
_45
0
+45
Tint control pin voltage (V)
B
400 mV
p-p
stair step R-Y, B-Y input
Tint control pin voltage: MAX.
V
CC
= 5 V
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