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3.5 Setting Up and Solving Circuit Equations 233
With AnalysisMode −> Transient, you can set up a system of differential-algebraic equations (DAE)
for nonlinear dynamic circuits. The independent variable of transient analysis is given by the value
of the option IndependentVariable, which is not necessarily time.
BranchCurrentPrefix
With
BranchCurrentPrefix −> "string", you can specify the prefix string CircuitEquations prepends to
an element’s reference designator to generate a unique branch current identifier.
For example, with BranchCurrentPrefix −> "I$", the current through a resistor R1 will be named
I$R1.
Symbol["string" "refdes"] must yield a valid symbol. Therefore, "string" must not
contain characters which have a special meaning in Mathematica.
BranchVoltagePrefix
With
BranchVoltagePrefix −> "string", you can specify the prefix string CircuitEquations prepends to
an element’s reference designator to generate a unique branch voltage identifier.
For example, with BranchVoltagePrefix −> "V$", the voltage across a resistor R1 will be named
V$R1.
Symbol["string" "refdes"] must yield a valid symbol. Therefore, "string" must not
contain characters which have a special meaning in Mathematica.
ControllingCurrentPrefix
With ControllingCurrentPrefix −> "string", you can specify the prefix string CircuitEquations
prepends to the reference designator of a current-controlled source to generate a unique identifier
for the controlling current.
For example, with ControllingCurrentPrefix −> "IC$", the controlling current of a currentcontrolled
voltage source CV1 will be named IC$CV1.
Symbol["string" "refdes"] must yield a valid symbol. Therefore, "string" must not
contain characters which have a special meaning in Mathematica.