- #1
swraman
- 167
- 0
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?
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?