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Determine the expression of output voltage for inverting summing amplifier consisting of four internal resistors? (Assume the value of internal resistors to be equal)

Determine the expression of output voltage for inverting summing amplifier consisting of four internal resistors? (Assume the value of internal resistors to be equal) Correct Answer Vo = -(Rf/R )×(Va +Vb+Vc+Vd)

If the internal resistors of the circuit is same i.e Ra=Rb=Rc=Rd=R (since there are four internal resistor) Then, the output voltage for inverting amplifier is given as Vo= -(Rf/R)×(Va +Vb+Vc+Vd).

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