| 发明名称 |
TELEPHONE SUBSCRIBER CONSTANT CURRENT SUPPLYING CIRCUIT |
| 摘要 |
<p>A communication line interface circuit including a floating current source supplying a constant current substantially independent of loop length is disclosed. The line interface circuit is provided with circuitry for line supervision and the detection of dial pulse signaling.</p> |
| 申请公布号 |
JPS5386507(A) |
申请公布日期 |
1978.07.31 |
| 申请号 |
JP19780000042 |
申请日期 |
1978.01.05 |
| 申请人 |
WESTERN ELECTRIC CO |
发明人 |
REIMONZU FUREIMANISU |
| 分类号 |
H04Q3/42;H02M3/28;H04M19/00;H04Q3/72 |
主分类号 |
H04Q3/42 |
| 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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