Nodal analysis solves circuit voltages by applying Kirchhoff's current law to each junction, or node. The designer selects a reference node, assigns it zero volts, and writes a system of equations stating that the algebraic sum of currents leaving every other node is zero. Solving these equations yields the voltage at every point in the circuit relative to ground.
Run a quick nodal analysis by hand to verify the bias voltages before we simulate the whole amplifier.
Related terms
Node
A continuous connection point in a circuit where two or more components meet.
Thévenin's theorem
An analytical method used to simplify complex linear circuits into a single voltage source and a single series resistor.
Norton's theorem
A circuit analysis rule stating that any linear network can be reduced to one current source and one parallel resistor.