发明名称 |
Electronic current feed circuit |
摘要 |
A current feed circuit for a telephone exchange transmission bridge comprising a pair of electronic circuit elements each of which has one terminal connected to a respective one of a pair of telephone lines and another terminal connected to one terminal of an electrical power supply. Each circuit element is a simulated inductance and can provide a resistive path for d.c. current from the power supply to a subscriber's telephone.
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申请公布号 |
US4088843(A) |
申请公布日期 |
1978.05.09 |
申请号 |
US19760740087 |
申请日期 |
1976.11.09 |
申请人 |
THE POST OFFICE |
发明人 |
ROGERS, ALASTAIR STANLEY;THURLOW, NORMAN THOROGOOD |
分类号 |
H04Q3/42;H04M19/00;H04Q3/72;(IPC1-7):H04M19/08 |
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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