| 发明名称 |
TRANSMISSION AND RECEPTION CIRCUIT OF TONE SIGNAL |
| 摘要 |
PURPOSE:To constitute the transmission and reception circuit for tone signal very simply by receiving the tone signal train and one tone signal selection circuit in serial with the local signal and by using the local signal also for the transmission. |
| 申请公布号 |
JPS5419304(A) |
申请公布日期 |
1979.02.14 |
| 申请号 |
JP19770084383 |
申请日期 |
1977.07.13 |
| 申请人 |
NIPPON ELECTRIC CO;NIPPON TELEGRAPH & TELEPHONE |
发明人 |
IKOMA YUKIO;MIZUKAMI TOMIAKI;TAKAMURA MITSURU;TSUJIMURA KIYOYUKI |
| 分类号 |
H04B1/40;H04M1/50 |
主分类号 |
H04B1/40 |
| 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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