| 发明名称 |
Battery-feed circuit for exchange |
| 摘要 |
A compact battery-feed circuit for an exchange, including two feedback circuits provided for two wires, one being a dc feedback circuit for the dc voltage on the two wires, and the other being an ac feedback circuit for the ac voltage signal on the two wires.
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| 申请公布号 |
US4872199(A) |
申请公布日期 |
1989.10.03 |
| 申请号 |
US19890296273 |
申请日期 |
1989.01.11 |
| 申请人 |
FUJITSU LIMITED |
发明人 |
KAWAMI, SHIGERU;TABU, TAKASHI;SANO, SHIGEO;MASUDA, NOBUYUKI |
| 分类号 |
H04M15/00;H04M19/00;H04M19/02 |
主分类号 |
H04M15/00 |
| 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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