D2.19 Use an ideal op amp to design an inverting integrator with an input resistance of 10 kΩ and an integration time constant of 10−3 s. What is the gain magnitude and phase angle of this circuit at 10 rad/s and at 1 rad/s? What is the frequency at which the gain magnitude is unity? R = 10 kΩ, C = 0.1 µF; at ω = 10 rad/s: |Vo/Vi| = 100 V/V and ϕ = +90°; at ω = 1 rad/s: |Vo/Vi| = 1000 V/V and ϕ = +90°; 1000 rad/s