Statistically modeling I-V characteristics of CNT-FET with LASSO

With the advent of internet of things(IOT),the need for studying new material and devices for various applications is increasing.Traditionally we build compact models for transistors on the basis of physics.But physical models are expensive and need a very long time to adjust for non-ideal effects.As the vision for the application of many novel devices is not certain or the manufacture process is not mature,deriving generalized accurate physical models for such devices is very strenuous,whereas statistical modeling is becoming a potential method because of its data oriented property and fast implementation.In this paper,one classical statistical regression method,LASSO,is used to model the I-V characteristics of CNT-FET and a pseudo-PMOS inverter simulation based on the trained model is implemented in Cadence.The normalized relative mean square prediction error of the trained model versus experiment sample data and the simulation results show that the model is acceptable for digital circuit static simulation.And such modeling methodology can extend to general devices.