Current Dependent modelling

Current Dependant Modelling

A component's resistance or Voltage may vary due to the level of current passing

through it, or a related part of the Circuit.

The best example of this is a diode, whose forward biased resistance

at room temperature is equal to 0.025 divided by the current flowing through it.

To define your own current dependancy specifications, use this format

when designating a value to a component.

Other term(s) + Scalar (/ or *) Dependancy

| |

Variable I = Current flowing through this device

or fixed T = Current flowing perpendicular to this device

Link = Current flowing through the two

specified nodes

note: A node is a section of a circuit that is composed entirely of wires. They are labeled alphebetically from top left to bottom-right

Virtual nodes are introduced directly above or to the left of any component in parellel with another.

Virtual nodes are labeled from top-left to bottom-right alphabetically starting from the label of the last actual node.

The number of nodes must be kept to a minimum for quick and accurate analysis

note: The symbol T is used primarily BJT modelling and is not reccomended for other devices

note: If the / symbol is used and current drops to 0 or below the resistance becomes infinity.