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參數(shù)資料
| 型號(hào)： | BH7272KV |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | PV 3C 3#16 SKT PLUG |
| 中文描述： | 雙通道錄像機(jī)前/承包數(shù)字錄像機(jī)放大器 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 185K |
| 代理商： | BH7272KV |
2
Video ICs
BH7272KV
Block diagram
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
48
47
46
45
44
43
42
41
40
39
38
37
1k
10k
3rd
2nd
AGC
DET
IAMP
PRE
IAMP
IAMP
PRE
IAMP
1k
10k
Bias
BH7272KV
LIMIT
LIMIT LEVEL adj
LIMIT Vth adj
REC LIMIT – OUT
REC LIMIT + OUT
GND
Vcc 4.9V
REC GATE
REC “H”
Vcc 3.0V
BIAS FILTER
Vcc 4.9V
REC BTL B I0adj
GND
Vcc 4.9V
PB 2nd OUT A
PB 2nd OUT B
PB 2nd IN A
PB 2nd IN B
PB SW – OUT
PB SW + OUT
HEAD SW CTRL
PB “H”
Vcc 4.9V
REC BTL A I0adj
P
P
N
P
A
P
P
P
P
P
G
R
R
H
H
R
G
P
P
G
R
H
H
R
VAMP
Balance
Balance
BF
V
CC
/ GND pins
Pin No.
Pin name
Function
14
8
V
CC
4.9V
GND
REC current amplifier
As above
38
37
V
CC
4.9V
GND
PB amplifier, PB AGC, peak amplifier
As above
47
V
CC
4.9V
GND
PB first-stage amplifier
PB first-stage amplifier, REC current amplifier
16
V
CC
3.0V
Control logic
19
20
26
V
CC
4.9V
GND
GND
Bias, REC limiter amplifier
Bias, control logic
REC limiter amplifier
Make sure that the voltages at V
CC
and GND pins does not sway.
Be especially careful of the V
CC
and GND for the first-stage amplifier.
The playback system has high gain, so take care to ensure that the output does not find its way back to the input.
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