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參數(shù)資料
| 型號： | BH7273KV |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Equalizer and ATF circuit IC for Digital VCRs |
| 中文描述： | 均衡器和ATF電路數(shù)字錄像機集成電路 |
| 文件頁數(shù)： | 2/13頁 |
| 文件大小： | 169K |
| 代理商： | BH7273KV |
2
Video ICs
BH7273KV
Block diagram
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
48
60
61
62
63
64
59
58
57
56
55
54
53
52
51
50
49
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
14
13
12
16
15
11
10
9
8
7
6
5
4
3
2
1
D
D
AMP
VCA
AMP
AMP25dB
14 / 24dB
47k 47k
SUBTRACT
697.5kHz BPF
465.0kHz BPF
1.5MHz LPF
CTRL
VCA
AMP
AMP
BF
BF
Mix
BH7273KV
V
G
F
F
V
S
O
O
N
G
M
M
M
M
G
V
N.C.
F1 AMP OUT
F2 AMP OUT
F2 AMP IN
F1 AMP IN
F1 BPF OUT
F2 BPF OUT
F2 adj
F1 adj
GCA OUT
GND
Vcc 4.9V
GAIN adj
GAIN SW
ATF IN
GND
N.C.
N.C.
N.C.
N.C.
BF OUT2
BF OUT1
BF IN
GND
TVF2AMP OUT
TVF2AMP – IN
TVF2AMP + IN
Vcc 4.9V
GND
TVF1AMP OUT
TVF1AMP – IN
TVF1AMP + IN
S
V
B
B
B
A
A
A
D
D
G
T
T
T
V
G
Vcc-GND pin table
Pin No.
Pin name
Function
2
11
V
CC
4.9V
GND
All pass filter for pins 3 to 10
Same as above
15
16
V
CC
4.9V
GND
12-14pin VCA, 17-19pin AMP
Same as above
33
34
V
CC
4.9V
GND
35-38pin MIX AMP
35-38pin MIX AMP
44
39
V
CC
4.9V
GND
Detector, subtractor circuit
Same as above
48
47
V
CC
4.9V
GND
BPF, 25dBAMP
Same as above
60
59
V
CC
4.9V
GND
LPF, GCA
Same as above
64
GND
N.C.
(Connected to GND to lower impedance)
21
20
25
V
CC
4.9V
GND
GND
22-24pin AMP, 26-28pin BUFF
22-24pin AMP
26-28pin BUFF
Make sure that Vcc and GND do not sway.
Separate the equalizer and ATF grounds.
Since the gain of the ATF circuit is high, make sure that there is no return from the output to input.
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