Consider the circuit obtained from that of by connecting an additional resistance R4 between the inverting-input node of OA1 and ground. Analyze the circuit, and specify suitable values for R2 and R4...

Consider the circuit obtained from that of by connecting an additional resistance R4 between the inverting-input node of OA1 and ground. Analyze the circuit, and specify suitable values for R2 and R4 (while leaving R1 5 R3 5 10 kV) so that the circuit gives vO 5 2uvI u. Hint: investigate the cases vI . 0 and vI , 0 separately.