Is this the formula for instrumentation amplifier?

Discussion in 'General Electronics Chat' started by rkbshiva, Aug 1, 2015.

  1. rkbshiva

    Thread Starter New Member

    Aug 1, 2015
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  2. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    The only difference between the equation and your question is a - sign. The equation is correct as stated because V2 is the non-inverting input for the overall circuit, and the standard way of describing amplifier gain is the non-inverting input minus the inverting input.

    ak
     
  3. rkbshiva

    Thread Starter New Member

    Aug 1, 2015
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    That's what I have stated
     
  4. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    Actually, there is a minor error, but not the one you stated. The equation V3-4 = ... should be V4-3 = ...

    ak
     
    rkbshiva likes this.
  5. Brownout

    Well-Known Member

    Jan 10, 2012
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    Yes.
     
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