A good compromise between accuracy and computational efficiency is given by table-based device models. The best results are obtained with physically motivated interpolation, such as piecewise polynomial and/or exponential splines, of the terminal currents and charges [48]. An advantage of this approach is that it allows a simple interface with experimental data or simulation results. These simulations can be performed accurately by a device simulator (available in TCAD frameworks).
A method using simple transient simulations with the
VISTA's MINIMOS [49]
device simulator suitable for the creation of the model data
table is presented in [50]. Basically, it consists of the
creation of a table with terminal currents and charges for a large
set of biasing conditions (the bulk, gate and drain voltages - ,
and
). This
data is then supplied to MINISIM [51], a circuit simulator
which uses a charge conservative model and piecewise polynomial and/or
exponential splines interpolation according to the axis: Piecewise
polynomial in the
and
,
or exponential in the
direction.