Hello All, I am working on a project where I am trying to replicate the behavior of a particular inductance module used on an automobile. It is a simple component that receives a signal from a control unit and the response is sent back via ground. The attached PNG file shows the setup, it is very simple. The signal is received at the positive terminal from a control unit and the response is read by the control unit at the negative terminal. http://imageshack.us/a/img17/2072/99268116.png [Broken] I have measured the response of this component using an oscilloscope and the files are attached below. I have read about convolution of signals and replicating a particular response based on it's response to a known signal but I am still somewhat confused on where to begin. One issue that I have is that I do not know what signal the module receives when it is being used in it's desired setting ( on a vehicle ) I believe that it receives a PWM signal from a control module but unfortunately I have not been able to measure the output signal from the vehicle. My ultimate goal is to produce a the same response using a gyrator circuit as opposed to the bulky inductance module. I have taken a module apart and it is just wound copper wire in a metal enclosure, my plan of attack at the moment is to model various circuits in LTSpice and try to produce a similar response. From what I can tell from the measurements that I made it looks like it is simply producing a steady voltage for the module to read... Response collected from the module on the bench...I wanted to read it's response using various input signals since I do not know the exact signal that it receives when plugged into the vehicle. http://imageshack.us/a/img841/1385/tek00015.png [Broken] http://imageshack.us/a/img43/1148/tek00010.png [Broken] http://imageshack.us/a/img109/5586/tek00000.png [Broken] http://imageshack.us/a/img96/3377/tek00001.png [Broken] Again I apologize if this seems trivial or a stupid question, I just wanted to know how other engineers would tackle this project, and and all comments welcome!