发明名称 |
BIDIRECTIONAL AMPLIFIER, BIDIRECTIONAL CATV SYSTEM, AND TURNOUT |
摘要 |
PROBLEM TO BE SOLVED: To provide a bidirectional amplifier in which a transformer for turnout is hardly magnetized by noise caused by lightning. SOLUTION: In a bidirectional amplifier 1, a capacitor 50 is provided on a path from a coil 34a of a transformer 30 for turnout to a ground position E1. Electrostatic capacitance of the capacitor 50 is set within a range from 10pF to 220pF as electrostatic capacitance with which a signal of the same frequency band as a down signal and an up signal is passed through the ground position E1 and passing of a signal of a lower frequency than the frequency band of the down/up signal (noise caused by lightning) is suppressed (the signal is attenuated). COPYRIGHT: (C)2004,JPO
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申请公布号 |
JP2004064748(A) |
申请公布日期 |
2004.02.26 |
申请号 |
JP20030157102 |
申请日期 |
2003.06.02 |
申请人 |
MASPRO DENKOH CORP |
发明人 |
HARADA YOSHIHIRO |
分类号 |
H04N7/10;H03F3/62;H04B3/38;(IPC1-7):H04B3/38 |
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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