TA8659（创维A机芯）视频色度扫描信号处理电路
|
脚号 |
有信号电压/V |
正向对地电阻/KΩ |
反向对地电阻KΩ |
引脚功能 |
|
1 |
8.6 |
10 |
12.5 |
SECAM制B-Y去加重测试端 |
|
2 |
8.4 |
8 |
8 |
R-Y输出 |
|
3 |
8.4 |
10 |
13 |
SECAM制R-Y去加重 |
|
4 |
8.6 |
9.5 |
13 |
SECAM制B-Y鉴频网络 |
|
5 |
0.4 |
10.5 |
13 |
|
6 |
12 |
0.3 |
0.3 |
色度信号处理电路供电 |
|
7 |
3.2 |
10 |
13 |
色饱和度控制 |
|
8 |
0.5 |
10.5 |
13 |
SECAM制R-Y鉴频网络 |
|
9 |
6.6 |
9.5 |
13 |
|
10 |
5.8/0 |
9.5 |
12 |
PAL/SECAM制开关 |
|
11 |
5.8/0 |
9 |
12 |
4.43M/3.58M开关 |
|
12 |
5 |
10 |
12 |
色度信号延时输入 |
|
13 |
5 |
10 |
12 |
直流偏置 |
|
14 |
7.6 |
2 |
2 |
色度信号延时激励/色度输出 |
|
15 |
5.8 |
3 |
3 |
NTSC色调调整 |
|
16 |
8.6 |
9.5 |
13 |
ACC滤波 |
|
17 |
3.4 |
10 |
12 |
直流反馈 |
|
18 |
4.4 |
9.5 |
12 |
SECAM制信号输入 |
|
19 |
0 |
0 |
0 |
色度信号地 |
|
20 |
5.8 |
10 |
12 |
PAL/NTSC信号输入 |
|
21 |
2 |
9.5 |
12 |
PAL/NTSC/SECAM制开关 |
|
22 |
5.2 |
10 |
12 |
PAL识别滤波 |
|
23 |
5.4 |
8.5 |
9.5 |
SECAM识别滤波口 |
|
24 |
4.8 |
10 |
13 |
SECAM基准 |
|
25 |
4.8 |
9.5 |
12 |
APC滤波 |
|
26 |
3.2 |
6 |
6 |
外接4.43M晶振 |
|
27 |
4.6 |
10 |
12 |
NTSC识别 |
|
28 |
3.2 |
6 |
6 |
外接3.58M晶振 |
|
29 |
0.8 |
1.3 |
1.3 |
场激励输出 |
|
30 |
8.4 |
10 |
13 |
压控晶振 |
|
31 |
6 |
10 |
13 |
场锯齿波形成 |
|
32 |
6.2 |
8.5 |
9.5 |
场负反馈输入 |
|
33 |
6.8 |
10 |
13 |
同步分离输入 |
|
34 |
3 |
9.5 |
29 |
选通脉冲滤波 |
|
35 |
1.2 |
10 |
12 |
行消隐输入/输出 |
|
36 |
7.2 |
10 |
24 |
AFC滤波 |
|
37 |
6 |
10 |
13 |
压控振荡器 |
|
38 |
6.4 |
10 |
14 |
行逆程脉冲输入 |
|
39 |
2.2 |
1 |
1 |
行输出 |
|
40 |
9.1 |
7 |
12 |
行电源 |
|
41 |
4.5 |
7 |
7 |
R输出 |
|
42 |
4.5 |
7 |
7 |
G输出 |
|
43 |
4.5 |
8 |
8.5 |
B输出 |
|
44 |
1.2 |
10 |
13 |
R箝位 |
|
45 |
1.2 |
10 |
13 |
G箝位 |
|
46 |
1.2 |
10 |
13 |
B箝位 |
|
47 |
1.8 |
10 |
13 |
外加R输入 |
|
48 |
3.6 |
9 |
11 |
亮度控制输入 |
|
49 |
1.8 |
10 |
13 |
外加G输入 |
|
50 |
0 |
0 |
0 |
视频偏转电路地 |
|
51 |
1.8 |
10 |
13 |
外加B输入 |
|
52 |
0 |
10 |
12 |
X射线保护 |
|
53 |
0 |
8 |
9.5 |
TV/外输入开关 |
|
54 |
0 |
1 |
1 |
色度开关 |
|
55 |
7.8 |
0.7 |
0.7 |
色度控制输入 |
|
56 |
3.2 |
10 |
13 |
微分信号输入 |
|
57 |
2.4 |
10 |
13 |
箝位 |
|
58 |
4.4 |
10 |
13 |
Y/视频信号输入 |
|
59 |
4 |
9 |
11 |
对比度控制 |
|
60 |
1.4 |
10 |
13 |
R-Y输入 |
|
61 |
12 |
0.5 |
0.5 |
供电 |
|
62 |
1.4 |
10 |
13 |
B-Y输入 |
|
63 |
12 |
0.5 |
0.5 |
供电 |
|
64 |
8.4 |
8 |
8.5 |
B-Y输出 |
