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238 3. Reference Manual<br />

If the IndependentVariable is not identical to the TimeVariable, then all time derivatives<br />

in a system of circuit equations are set to zero and all explicit references to Time are<br />

replaced by the value of InitialTime.<br />

If the IndependentVariable is identical to the TimeVariable, then any derivatives with<br />

respect to other variables, such as temperature, are set to zero.<br />

InitialConditions<br />

The option InitialConditions allows you to specify how CircuitEquations handles initial<br />

conditions for dynamic quantities, such as capacitor voltages and inductor currents. The following<br />

values are allowed:<br />

Automatic<br />

All<br />

None<br />

use initial conditions where given in the value field of<br />

netlist entries<br />

use initial conditions where given explicitly, set initial<br />

conditions of all other dynamic quantities to zero<br />

do not use any given initial conditions<br />

Values for the InitialConditions option.<br />

InitialTime<br />

With InitialTime −> t , you can specify the point of time for which initial conditions are given. By<br />

default, t ⩵ , but you may choose any other value.<br />

NodeVoltagePrefix<br />

With NodeVoltagePrefix −> "string" you can specify the prefix string CircuitEquations prepends<br />

to a node name to generate a node voltage identifier.<br />

For example, with NodeVoltagePrefix −> "V$", the node voltage at node 1 will be named V$1.<br />

Symbol["string" "node"] must yield a valid symbol. Therefore, "string" must not contain<br />

characters which have a special meaning in Mathematica.

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