发明名称 |
PERFECCIONAMIENTOS EN UN CIRCUITO DE EVALUACION PARA CAPTADORES PASIVOS DE MAGNITUDES DE MEDIDA |
摘要 |
<p>An evaluation circuit for a passive measurement variable pickup having resistor sensors disposed in a bridge circuit is disclosed. In one embodiment, a double throw switch alternately connects a balancing resistor across resistors of the bridge circuit. A balancing difference signal is generated by a preamplifier coupled to the output of the bridge circuit. The preamplifier transmits d-c components of the balancing difference signal. The output of the preamplifier is coupled to a phase sensitive rectifier. The preamplifier has a linear phase frequency response and a linear modulation characteristic. The output of the rectifier is coupled to a null amplifier and the balancing resistor is coupled to a polarity reversing switch feeding the bridge circuit by circuitry which passes d-c components, e.g., a conductor, an operational amplifier or a switching device.</p> |
申请公布号 |
ES535406(D0) |
申请公布日期 |
1985.05.01 |
申请号 |
ES20060005354 |
申请日期 |
1984.08.24 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT, DE BERLIN Y MUNCHEN |
发明人 |
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分类号 |
G01R27/02;G01D3/036;G01D5/16;G01R17/00;G01R33/02;G01R33/09;(IPC1-7):G01D1/00;G01R17/10 |
主分类号 |
G01R27/02 |
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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