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3.12 Nonlinear Simplification Techniques 403
3.12 Nonlinear Simplification Techniques
As of version 2, Analog Insydes provides completely new functionality for the simplification of
nonlinear circuits: Besides the main functions CompressNonlinearEquations and CancelTerms,
there are a number of supporting procedures. The following table shows all commands which build
the simplification functionality for nonlinear circuits:
NonlinearSetup (Section 3.12.1)
setting up the nonlinear approximation procedure
CompressNonlinearEquations (Section 3.12.2)
eliminating variables in a DAEObject
CancelTerms (Section 3.12.3)
removing terms in different levels in a DAEObject
SimplifySamplePoints (Section 3.12.4)
generating sparsed sample-point grids
NonlinearSettings (Section 3.12.5)
showing nonlinear settings in a DAEObject
ShowLevel (Section 3.12.6)
showing terms of a DAEObject in different levels
ShowCancellations (Section 3.12.7)
showing terms of a DAEObject which have been removed
3.12.1 NonlinearSetup
NonlinearSetup[dae, inputs, outputs, mode −>{settings
}, † † † ]
initializes the nonlinear approximation routines
Command structure of NonlinearSetup.
Before applying the nonlinear simplification routines the DAEObject has to be set up using
NonlinearSetup. This function returns a DAEObject containing additional information which is
automatically used later on by the simplification functions. Furthermore, NonlinearSetup performs
the numerical reference simulations which are used for error calculation. Besides the input and output
variables you have to specify which analysis modes to consider during subsequent simplifications.
The DAEObject dae has to be a DC or Transient DAEObject. The argument inputs is a symbol or
a list of symbols denoting the input parameters to be swept. In this context input parameters are
parameters of the DAEObject (not variables). Use GetParameters (Section 3.6.9) to obtain a list of
valid parameters. Further, outputs is a symbol or a list of symbols denoting the output variables
which are used for error control. In this context output variables are variables of the DAEObject (not
parameters). Use GetVariables (Section 3.6.7) to obtain a list of valid variables.