I am doing lab preparation but I am not sure how to evaluate 741 amplifier sensitivity to loading based on my non-inverting circuit with a gain of 21 and my summing circuit with a gain of 55. I know that I should use you find gain for R1 and gain for R2, and then find the ratio of the relative changes. But I am not quite sure how to implement this.
(delta G/G ) / (delta A / A)
note: for non-inverting circuit my R1= 22Kohm, R2= 1.2kohm and for summing circuit R1=82kohm, R2=1.5kohm
Any help will be so very much appreciated.
Summing inverting amplifier: