发明名称 |
CIRCUIT DEVICE SEPARATING CORE OF SUBSCRIBER CONNECTION LINES FROM FEEDER CIRCUIT |
摘要 |
<p>The power circuit contains a voltage source for a negative and a positive supply voltage, the final stages of which are operational amplifiers (OPa, OPb). The wires of the subscriber connection line are disconnected by disconnecting the reference voltage on the control inputs of the final-stage transistors of these operational amplifiers. <IMAGE></p> |
申请公布号 |
JPS6313564(A) |
申请公布日期 |
1988.01.20 |
申请号 |
JP19870157992 |
申请日期 |
1987.06.26 |
申请人 |
SIEMENS AG;SGS MICROELETTRONICA SPA |
发明人 |
HANSU BUERUNAA RUDORUFU;HARARUTO SHIYUTAADAA;MARUKO SHIRIGOONI |
分类号 |
H04M3/00;H04M19/00 |
主分类号 |
H04M3/00 |
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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