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232 3. Reference Manual
option name
default value
DesignPoint Automatic the design point for a symbolic DAEObject
IgnoreMissingGround False whether to ignore a missing analog ground
node
Protocol
Miscellaneous options for CircuitEquations.
Inherited[AnalogInsydes]
standard Analog Insydes protocol
specification (see Section 3.14.5)
See also: Netlist (Section 3.1.1), Circuit (Section 3.1.2), ExpandSubcircuits (Section 3.4.1),
Chapter 4.3.
Options Description
A detailed description of all CircuitEquations options is given below in alphabetical order:
AnalysisMode
The option AnalysisMode −> mode specifies the circuit analysis mode for which CircuitEquations
sets up a system of equations. Possible values are:
AC
DC
Transient
small-signal frequency-domain (AC) analysis
operating-point (DC) or DC-transfer (DT) analysis
large-signal time-domain (transient) analysis
Values for the AnalysisMode option.
With the setting AnalysisMode −> AC, CircuitEquations sets up a system of small-signal Laplacedomain
equations. CircuitEquations does not linearize nonlinear circuits. Therefore, the first
argument of CircuitEquations must represent a linear circuit. If it contains references to device
models, the AC equivalent circuits of the referenced device are used to set up the equations.
By default, AC equations are set up in matrix formulation, but this can be changed using the
MatrixEquation option (see below).
With the setting AnalysisMode −> DC, CircuitEquations yields a system of (usually nonlinear) DC
equations. Any time derivatives resulting from the constitutive equations of dynamic elements as
well as derivatives with respect to other independent quantities are set to zero.