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7-4. RGB Signal Amplification Section
7-4-1. RGB Signal Switch Circuit
The RGB input signals and the video signal demodu-
lated into RGB signals are switched by QB011 (Analog
SW: M52348FP). The block diagram of QB011 is shown
in Fig. 7-4-1.
7-4-2. Sync Signal Process Circuit
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
0.01µ
0.01µ 0.01µ
0.01µ
47µ
+
0.01µ
+
+
0.01µ
+ +
+ + +
0.01µ
+ +
0.01µ
0.01µ
R OUT
G OUT
B OUT
G OUT (for Sync on G)
H OUT
V OUT
OUTPUT
RIN1
G
IN1
B
IN1
H
IN1
V
IN1
R
IN2
G
IN2
B
IN2
H
IN2
V
IN2
RGB
input
Demodulation
VIDEO
RGB
High : Demodulation
Low : RGB input
Vcc
5V
VIDEO
HD (CS) and VD signals are also switched in the same
way as described above. This IC provides the exclusive
output terminal for SYNC/G.
The RGB signals developed enter the RGB amplification
circuit via buffers, and the HD (CS), VD, SYNC/G signals
enter the sync signal process circuit.
Fig. 7-4-1 Block diagram of M52348FP