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參數(shù)資料
| 型號： | LA7790M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | QPSK Transmitter for Cable TV |
| 中文描述： | 調(diào)制變送器有線電視 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 174K |
| 代理商： | LA7790M |
Equivalent circuit of RF amplifier block
No. 5689-11/14
LA7790M
V
CC
Vout
Choke
Coil
RF
output
0 to 3
μ
A
Mute
23
V
CC
30 mA
from
1st stage
5 k
R2
R1
300
Mute
2nd stage
1st stage
Power save
RF Amplifier Gain ··
The gain of RF amplifier can be adjusted by changing the value R1.
R1 : Input Resistor
R1 + R2 + 300
R1 + 300
300
75
Load resistor
V
CC
1
RF input
Power
save
0 to 4
μ
A
Vin
22
300
3.5 V
20
Unit (resistance :
)
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