发明名称 |
APPLYING A SIGNAL TO A TRANSMISSION LINE |
摘要 |
An electronic circuit for applying a signal to a telephone line is disclosed wherein the signal to be transferred is superimposed on a direct current and applied to the reference voltage circuit of a bidirectional current source. The current source in turn applies, from high internal resistances, oppositely directed currents which are equal to each other and proportional to the signal onto the two wires of the telephone line. |
申请公布号 |
AU4887579(A) |
申请公布日期 |
1980.01.17 |
申请号 |
AU19790048875 |
申请日期 |
1979.07.12 |
申请人 |
PHILIPS' GLOEILAMPENFABRIEKEN, N.V. |
发明人 |
FRANCISCUS ADRIANUS CORNELIS MARIA SCHOOFS |
分类号 |
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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