74LV07
PIN4
PIN2
5V
5V
RL50
1K
Ω
RL51
1K
Ω
VS(Interlacing signal)
HS(Line signal)
BAV99 :
If the PIN 3 of BAV99(Q9) is Low-level ( 0V ),
Said system detects VGA
monitor;
If the PIN 3 of BAV99(Q9) is high-level (nearly 3.3V),said system doesn’t detect
VGA monitor;
VGA
module components
：
5.3. VOUT Output Module (Local Preview Image Output Module)
VOUT main control chip: SGM9111, PIN 3 pull-down 75Ωresistance
(RS188) grounding and input CVBS-OUT signal, PIN 4 through the
75Ωresistance (RS117) output VOUT signal, working voltage through a
LVC07A
BAV99
（
Q3/7/8/9/10/11
）
6303
75
Ω（
RG4/5/6
）
1K
（
RL50
）
33
Ω（
RG27/28
）
1K
（
RL51
）
