Wheatstone measurement bridge is kind of very accurate measurement approach   
   due differential measurement. But it is also very complex if impedances in   
   branches of the bridge are not pure resistive. On the other hand, pure   
   resistive bridge can be    
   simulated if imaginary parts are set to zero.   
      
      
   http://www.cirvirlab.com/index.php/electric/102-wheatstone-measu   
   ement-bridge-simulation.html   
      
   http://www.cirvirlab.com/simulation/wheatstone_measurement_bridge_online.php   
      
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