专利名称：Active RC-filtercircuit发明人：GOEPEL, ERNST申请号：EP02028439.4申请日：20021218公开号：EP1326334A3公开日：20040818
摘要：Positive input to the first operational amplifier and the input voltage forapplying via resistance configuration to its negative input via resistance and capacitor.Amplifier is exported via resistance feedback to its negative input. The positive input ofsecond amplifier is embedded in soil via a capacitor. Positive input connects. Secondamplifier output feedback arrives its negative input. Amplifier output one differencechannel of supply. It is laid out first and second operational amplifier (X1, X2) with positiveand negative input. Via the positive input to the first amplifier and via first resistor and acapacitor to first and second resistance of its negative input, apply an input voltage (U1).First amplifier arrives its negative input via 3rd resistor feedback. The positive input ofsecond amplifier is connected to be buried in the earth via a capacitor, positive inputconnection, and the second amplifier output feedback arrives its negative input. Amplifieroutput supply proves a difference channel (X3) of output voltage (U2).
申请人：SIEMENS GEBAEUDESICHERHEIT GMBH & CO. OHG
地址：Frankfurter Ring 152 80807 München DE
国籍：DE
代理机构：Berg, Peter, Dipl.-Ing.
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