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參數(shù)資料
| 型號： | AN5095 |
| 廠商： | Panasonic Corporation |
| 英文描述： | Single chip IC with I2C bus interface for PAL/NTSC color TV system |
| 中文描述： | 單一的PAL制式的I2C總線接口芯片IC / NTSC彩色電視系統(tǒng) |
| 文件頁數(shù)： | 16/36頁 |
| 文件大?。?/td> | 405K |
| 代理商： | AN5095 |
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16
AN5095K
ICs for TV
I
Electrical Characteristics at T
a
=
25
°
C (continued)
Explanation of test methods (continued)
*6: Black level extension: V
BL
In the black level extension characteristics (figure 3), when
the voltage of pin 9 (black level detection filter) is V
CC1
=
9 V,
the operation of the black level extension circuit is turned off and
the characteristic becomes as shown by the line . Also, if
the voltage of pin 9 is set at 3 V, the black level extension forcibly
comes to start and the characteristic becomes as shown by the
line . When pin 9 is set by only R, C filter, the black level
extension characteristic as shown by the line can be
obtained.
V
BL3
shows an output level difference between the black
extension is off and the normal operation when the video input
level is constant in 20 IRE.
V
BLS
is a point where the black extension comes to start and can
be adjusted by the DC voltage of pin 48 (C
IN
).
V
48
2.5 V
4.5 V
6.5 V
Start point
52 IRE
42 IRE
32 IRE
*7: (C-Y)/Y ratio: RC/Y
C-Y is the voltage from 0 level to the peak of B-out when color is typ. (00
=
20) and contrast is typ. (03
=
20). Y is the voltage from the pedestal of contrast at typ. to 100 IRE white level.
*8: Burst gate pulse
As shown in figure 4, the position of the burst gate pulse is
the period from the rise time of the H-sync. signal of pin 46 to
the rise time of BGP.
BGP (4
μ
s)
P
BGP
Pin 62
SCP output
*9: FBP allowable range : t
FBP
Figure 5 shows the relationship between Hor. pulse and FBP.
The phase delay from Hor. pulse to FBP differs from set to set.
This IC has an adjusting function for the screen center position.
The phase range in which this function normally operate is t
FBP
.
W
BGP
H-sync.
Pin 46
Sync. input
Figure 4. Burst gate pulse
t
FBP
Pin 56
Hor. pulse
output
Pin 50
FBP
input
Figure 5. FBP allowable range
Y output when
operation is off
(
∝
Y input)
V
BL1
V
BLS
V
BL3
V
BL2
Pedestal level
Y
Figure 3. Black level expansion characteristics
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