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发明名称
CHANNEL CHANGEOVER CIRCUIT
摘要
申请公布号
JPH02308625(A)
申请公布日期
1990.12.21
申请号
JP19890127845
申请日期
1989.05.23
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
TANAKA KIYOSHI
分类号
H03L7/16;H04B1/04;H04B7/26
主分类号
H03L7/16
代理机构
代理人
主权项
地址
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