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參數(shù)資料
| 型號(hào)： | AN5693 |
| 廠(chǎng)商： | Panasonic Corporation |
| 英文描述： | Luminance,Chroma and Sync. Signals Processing ICwith Built-in I2Cbus Interfacefor PAL/NTSC Color-TV |
| 中文描述： | 亮度，色度和同步。信號(hào)處理ICwith內(nèi)置I2Cbus Interfacefor PAL / NTSC制式彩色電視 |
| 文件頁(yè)數(shù)： | 21/34頁(yè) |
| 文件大?。?/td> | 325K |
| 代理商： | AN5693 |
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21
ICs for TV
AN5693K
I
Pin Equivalent Circuit(continued)
Pin No.
Equivalent Circuit
Function
Status
30
Black level detecion output pin blanking
off switch pin :
For black expansion circuit's black
level detection output filter pin
For removing the blanking period and
holding the darkest Y level
By changing the external resistor, R,
the black level expansion sensitivity
can be changed. When R is bigger, area
of response is smaller
To stop black expansion circuit, set
Pin30 voltage to about V
CC
(9 V)
If Pin30 voltage is GND, blanking is
off.(Black expansion is also off)
DC
abuot 5.1 V
31
Video Input Pin :
Video signal input pin
(Composite video also allowable)
Standard input 0.6 V
PP
Sync. top is clamped to 3.5 V
Video signal is inputed to low impedance
inputs
AC
0.6 V
PP
32
Vertical Synchronous Signal Clamp Pin :
This is the peak clamp pin for vertical
synchronous signal separation
The integration of the vertical
synchronous signal is determined by
the internal time constant, but the
external time constant, R1, C1, is chosen
according to the required trigger timing
Using R1
>
200 k
R2 is the resistor which is used to
control the emitter current
AC
f
=
fV
9 V
(V
CC1
)
Y
30
5 V
(V
CC3
)
80
μ
A
80 k
75 k
10 k
100
μ
A
5.1 V
10 k
180 k
R
4.7
μ
F
To black
expansion
circuit
To
blanking
circuit
9 V
(V
CC1
)
47 k
4.3 V
43 k
31
1.8 k
10
μ
A
50
μ
A
5 V
(V
CC3
)
3 k
16 k
4.3 V
4 k
200
32
50 k
270
R1
680 k
R2
220
C1
2.2 μ
F
To ver.
count down
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