发明名称 |
CIRCUIT FOR THE COMPENSATION OF CURRENT INTERFERENCE SIGNALS |
摘要 |
<p>A circuit which compensates for interference signals when monitoring conditions such as overcurrents and the like in a larger network. The circuit includes a current-signal branch and a compensating branch, the latter fed with an interference voltage and containing a variable gain amplifier. Both branches of the circuit are coupled to a signal superimposing element in the form of a summing amplifier, the output of which is applied to a polarity comparator. The polarity comparator, which is three-state device, forms a portion of a feedback network for controlling the gain of the variable gain amplifier.</p> |
申请公布号 |
CA1023802(A) |
申请公布日期 |
1978.01.03 |
申请号 |
CA19740216393 |
申请日期 |
1974.12.18 |
申请人 |
SOCIETE ANONYME DES ATELIERS DE SECHERON |
发明人 |
FALK, JEAN-PIERRE;ROHR, ANDRE |
分类号 |
G01R19/00;H02H3/08;H02M1/15 |
主分类号 |
G01R19/00 |
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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