Toshiba TLP510E Technisch trainingshandboek - Pagina 36

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Sand castle
pulse
17
SAND CASTLE PULSE
DETECTOR
BK.H+V
BK
Y
BLACK LEVEL
16
CLAMP
100 nF
V
REF
450
180
ns
ns
V
100 nF
REF
13
100 nF
14
-(R-Y)
3
-(B-Y)
7
7-3-6. RGB Demodulation
The demodulation from Y and color difference signals to
RGB signals is carried out by QV008, TDA4780. Fig. 7-
3-10 shows the pin configuration of TDA4780 and Fig.
7-3-11 shows the block diagram. The TDA4780 performs
the RGB demodulation and adjusts color, contrast, and
brightness.
100 nF
2
2
I
C • BUS
Y delay
V
REF
Sand castle
5V / 12V
DELAY TIME
CONTROL
V
REF
Control signal
BLACK
180
90
45
LEVEL
ns
ns
ns
CLAMP
Fig. 7-3-9 Block diagram of TDA4672
SDA
SCL
9
10
2
I
C • BUS RECEIVERS
Coring
Peaking
on / off
frequency
5 MHz
100
90
ns
ns
2.6 MHz
5 MHz
2.6 MHz
BLACK
90
100
LEVEL
ns
ns
CLAMP
8
18
5
NC
FSW
2
1
R
2
2
G
2
3
B
2
4
V
P
5
-(B-Y)
6
-(R-Y)
7
Y
8
GND
9
R
10
1
G
1
11
B
12
1
FSW
13
1
SC
14
Fig. 7-3-10 Pin configuration of TDA4780
7-9
V = 5V to 8V
100 nF
P
1
15
V REF
GENERATION
V REF
CORING
-0.5
CORING
2
I
C • BUS
-0.5
PEAKING
2
I
C • BUS
+1
TDA4672
MED758
28
SCL
27
SDA
26
YHUE
C
25
R
R
24
O
C
23
G
G
22
O
TDA4780
C
21
B
B
20
O
Cl
19
C
18
POST
C
17
L
C
16
PDL
BCL
15
11
100 nF
Y
12
-(R-Y)
4
-(B-Y)
6