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250 3. Reference Manual
3.5.2 ACEquations
ACEquations[dae, oppoint, sources]
linearizes equations about oppoint, replaces sources by
values (specified via sources), and returns an AC DAEObject
ACEquations[dae, oppoint]
Command structure of ACEquations.
linearizes equations using the AC source specifiations
given by the ModeValues option stored in dae
Given a Transient or DC DAEObject, ACEquations linearizes the equation system about the given
operating point oppoint and returns an AC DAEObject. The operating point is given by a list of
rules of the form var −> value for each variable of the equation system. It is possible to assign
values to time derivatives of variables, too. The list of value mappings is added to the DesignPoint
option of the returned DAEObject. During linearization, the values of AC sources are replaced by
their AC value as given by sources, where sources is a list of rules of the form acsource −> val for
each parameter representing an AC source. If this third argument is omitted, the AC values are
automatically extracted from the ModeValues option stored in the DAEObject.
Note that, given a Netlist or Circuit object, you can set up AC equations directly using
CircuitEquations (Section 3.5.1).
ACEquations provides the following options:
option name
default value
FrequencyVariable Automatic specifies the symbol denoting the complex
Laplace frequency
OperatingPointPostfix "$op" string to append to variable names
denoting symbolic operating points
DerivativePostfix "d" string to append to variable names
denoting derivatives
Options for ACEquations.
See also: DCEquations (Section 3.5.3), CircuitEquations (Section 3.5.1).
Options Description
A detailed description of all ACEquations options is given below in alphabetical order: