need a second order effect on output conductance .or even something you can suggest. and Once the validity of a model has been established, the power of computer based models becomes evident. It is important to have a good estimate of component behavior (often by hand), but this estimate may not be sufficient to ensure effective, efficient behavior of a system. Computer models provide the opportunity to more accurately predict the performance of real world systems by investigating, analyzing, and including additional modeling parameters.
Thus, the level 1 model in Spice is expanded in the level 2 model to incorporate secondary effects which result from the physical structure and physical laws under which devices operate.
Alternately, models may be built around the performance of circuits and devices, without probing beyond the simplest physical understanding. These models may be built by fitting data to a general curve, or by creating a table of values to look-up.
In this exercise you are to help improve the model for a solid state IC device by explaining and modeling second and third order effects. Each student must individually select one second order effect to research. Then he must provide:
· A description of the physical behavior causing the second order effect, and it’s impact on the device characteristics.
· Information about how the computer modeling accounts for the second order effect, including model parameter names and typical values
· Illustrate the effect by generating data showing the behavior of the device both with and without the second order effect being included.
· All of this information will be shared with the class and the team through a professional presentation, followed up with a report.