Wheatstone Bridge with High Accuracy Instrumentation Amplifier

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In this SPICE simulation the circuit measures an unknown resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component, detecting the zero voltage with a multimeter when the balance is reached, with reference to this circuit when R1/R2 = R3/Rpot.The potential small voltage differences are amplified by a low power instrumentation amplifier AD620.

  • Free
  • Very simple
  • <10
  • NI Multisim
  • 11+
  • No
  • positive voltage output under 70% of pot negative voltage output over 70% of pot about zero voltage output for 70% of potentiometer, use A key for small variations


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