| 发明名称 |
CURRENT SUPPLY SYSTEM FOR TELEPHONE SET CIRCUIT USING ACTIVE ELEMENT |
| 摘要 |
PURPOSE:To secure a light weight and compactness with a high economization by using the impedance of the ringer winding for a DC islation between an aural signal and the power source at the calling time and also by using the capacity for DC blocking purpose to smooth the power source. |
| 申请公布号 |
JPS5314508(A) |
申请公布日期 |
1978.02.09 |
| 申请号 |
JP19760088284 |
申请日期 |
1976.07.26 |
| 申请人 |
NIPPON TELEGRAPH & TELEPHONE |
发明人 |
KAKEHI KAZUHIKO |
| 分类号 |
H04M1/60;H04M19/08 |
主分类号 |
H04M1/60 |
| 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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