3.2. Output and Transfer Characteristics of the MOSFET
The equations used in the following to characterize the MOSFET transistor are from the SPICE Level 1 model. SPICE also has more detailed models in Level 2 and Level 3. These can be specified when running SPICE. However, the number of new model parameters, in general, in circuit simulation is practically boundless. Level 1 is chosen here as it is the most intuitive, that is, the most suitable for an introductory discussion of device behavior. Some new models, for example, which focus on frequency response at very high frequencies, can include pages of equations. In addition, Level 1 is suitable and adequate for many examples of circuit simulation.
The basic common-source NMOS circuit configuration ...
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