{{fa>pencil?32}} For the non-inverting amplifier, derive the voltage gain. Use the procedure that was used for the voltage follower.. \\ {{icon>eye}} Solution Considering the golden rules of an amplifier leads to the output voltage signal \begin{equation*} U_O=U_I+R_1\cdot I=U_I+R_1\cdot\frac{U_I}{R_2}=(1+\frac{R_1}{R_2})\cdot U_I \end{equation*} The gain $A_V$ is the output voltage signal in relation to the input voltage signal. \begin{equation*} A_V=\frac{U_O}{U_I}=1+\frac{R_1}{R_2} \end{equation*}