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參數(shù)資料
| 型號： | HA12181FP |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | AM Radio Noise Reduction System |
| 中文描述： | AM收音機降噪系統(tǒng) |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 147K |
| 代理商： | HA12181FP |
HA12181FP
Rev.2, Jun. 1997, page 12 of 21
Example of Noise Reduction Effect
0
10
20
30
40
50
60
70
80
90
100
110
AM SG Output (EMF) (dB
μ
)
–
60
–
50
–
40
–
30
–
20
–
10
0
10
20
O
120
V
=8.2V
AM SG : fc=999kHz, m=30%, fm=1kHz
Pulse : No input
Vout
NRon
NRoff
Pulse : No input
Noise
AM SG : fc=999kHz,
no mod.
Pulse SG :
Refer to Figure.2
50
16
16
50
16
30
65p
15p
Pulse SG.
AM SG.
To
Two Signals dummy ANT.
Pulse SG Output (EMF)
10
μ
s
100mV
P-P
2
μ
s
Figure.2
0
10
20
30
40
50
60
70
80
90
100
110
AM SG Output (EMF) (dB
μ
)
–
60
–
50
–
40
–
30
–
20
–
10
0
10
20
O
120
V
=8.2V
AM SG : fc=999kHz, m=30%, fm=1kHz
Pulse : No input
Vout
50
16
16
50
16
30
65p
15p
Pulse SG.
AM SG.
To
Two Signals dummy ANT.
Pulse SG Output (EMF)
10
μ
s
100mV
P-P
10
μ
s
Figure.3
NRon
NRoff
Noise
AM SG : fc=999kHz,
no mod.
Pulse SG :
Refer to Figure.2
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