Consider the circuit in Figure P9.69. Assume ideal op-amps are used, (a) Derive the expres...

Consider the circuit in Figure P9.69. Assume ideal op-amps are used, (a) Derive the expression for the current iO as a function of input voltages υI 1 and υI 2 (b) Design the circuit such that iO = 5 mA for υI 1 = 0.25 V and υI 2 = −0.25 V. (c) Using the results of part (b), determine υO 1 and υo 2 if RL = 1kΩ. (d) Determine iO, υO 1, and υO2 for R = 500Ω, RL = 3Ω υI1 = 1.25 V, and υI2 = 1.75V