Norton's theorem simplifies complex networks of voltage sources, current sources, and resistors into a single equivalent circuit. Viewed from any two terminals, the entire network behaves identically to an ideal current source (the short-circuit current) wired in parallel with a single equivalent resistor. This transformation makes it much easier to calculate how a circuit will behave when different loads are attached.
Convert that messy bias network using Norton's theorem so we can quickly see how much current it will drive into the base of the transistor.
Related terms
Thévenin's theorem
An analytical method used to simplify complex linear circuits into a single voltage source and a single series resistor.
Nodal analysis
A systematic method for determining the voltage at every node in an electrical circuit.
Load
A component or circuit section that consumes electrical power from a source.