发明名称 |
ELECTRONIC SUBSCRIBER CONNECTOR |
摘要 |
For feeding a telephone subscriber's line without the use of a transformer, this junctor comprises a symmetrical amplifier whose two input terminals receive two negative feedback voltages derived from a weighted sum current of the currents entering and leaving the subscriber's line. To form this weighted sum current, use is made of a current mirror whose summing and input terminals are connected respectively to one terminal of the supply source and to the corresponding supply terminal of the amplifier, and a voltage divider connected between the output of the current mirror and the other terminal of the supply source and whose intermediate terminal is connected to the other supply terminal of the amplifier. The voltage ratio of the voltage divider is equal to the current ratio of the current mirror. The voltage at the ends of the voltage divider is applied to a voltage follower which is regulated to provide the weighted sum current with the desired amplitude. |
申请公布号 |
DE3066154(D1) |
申请公布日期 |
1984.02.23 |
申请号 |
DE19803066154 |
申请日期 |
1980.06.13 |
申请人 |
TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T. |
发明人 |
FERRIEU, GILBERT MARIE MARCEL |
分类号 |
H04Q3/42;G05F3/26;H03F3/343;H04M19/00;H04M19/02;(IPC1-7):H04Q3/00 |
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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