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Explain Instrumentation amplifier using 3 Op-Amp.
written 8.0 years ago by gravatar for teamques10 teamques10 ★ 65k modified 2.2 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
digital electronics
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written 8.0 years ago by gravatar for teamques10 teamques10 ★ 65k

  • Following diagram shows the instrumentation amplifier using 3 Op-Amp

    enter image description here

  • Instrumentation amplifier uses cross coupled difference amplifiers.

  • A1 and A2 are non-inverting amplifiers with their inverting terminal connected to $R_g$.

  • The input impedance of all the Op-Amps used is assumed to be infinite, therefore their input current is zero.

  • Thus current …

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