| 发明名称 |
Noise reducing device for up-going signals in bidirectional CATV system |
| 摘要 |
A device incorporated in a bidirectional CATV system for reducing noise introduced in an up-going channel at a subscriber station. A terminal unit and a protector perform monodirectional or bidirectional switching operations on the basis of a DC current which the terminal station selectively outputs.
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| 申请公布号 |
US5317392(A) |
申请公布日期 |
1994.05.31 |
| 申请号 |
US19910812687 |
申请日期 |
1991.12.23 |
| 申请人 |
NEC CORPORATION |
发明人 |
ISHIBASHI, RYOUJI;NISHIMOTO, NAOMASA |
| 分类号 |
H04N7/10;H04B3/32;H04H1/02;H04N7/16;H04N7/173;(IPC1-7):H04B3/32 |
主分类号 |
H04N7/10 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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