发明名称 |
Analog/digital integrated subscriber circuit |
摘要 |
<p>An analog/digital integrated subscriber circuit includes a power supply part supplying power with respect to a subscriber line, and a signal processing part carrying out a signal processing. The power supply part is provided with a D.C./D.C. converter which controls an ON-time of a switching by detecting an output voltage and an output current supplied to the subscriber line. The D.C./D.C. converter includes a switching mechanism for switching a power supply characteristic of the power supply part to a constant current characteristic up to a maximum output voltage when supplying the power with respect to a digital subscriber line and to a constant voltage characteristic having a voltage lower than the maximum output voltage when supplying the power with respect to an analog subscriber line. <IMAGE></p> |
申请公布号 |
EP0869655(A2) |
申请公布日期 |
1998.10.07 |
申请号 |
EP19970118466 |
申请日期 |
1997.10.23 |
申请人 |
FUJITSU LIMITED |
发明人 |
AWATA, YUTAKA;MIYOSHI, SEIJI;HIRAHARA, MINORU;GOTODA, TAKUO;ITOKAWA, HIROAKI |
分类号 |
H04M19/00;H04M3/00;H04Q3/42;(IPC1-7):H04M19/00 |
主分类号 |
H04M19/00 |
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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