Hi, I thought this would be a simple project but I have not been able to get this to work. I need to design a circuit that exhibits a resonance below 3kHz. It must be underdamped, and the drive current limited to ~5mA. I was usign this as an inductor: http://en.wikipedia.org/wiki/Gyrator At the bottom, which simulates the inductor. My values I am using are: RL=1kOhm C = .1uF R = 10kOhm these lead to a simulated L=.9 Combining this with a .01uF capacitor, I should get a resonance at about 1000rad/sec, and if I measure the voltage across the capacitor I should see a peak gain of 9.5 (determined analytically using Matlab). But when I put in a broadband random signal into the system, I see nothing when I measure the voltage across the capacitor but it looks exactly like my input broadband signal. Is there something I am missing?