Abstract--This paper shows how to write node or mesh analysis
linear circuit equations by inspection of the circuit schematic
diagram and obtains two different matrix solutions of these
equations. The linear circuit can have resistances or impedances,
controlled sources, ideal operational amplifiers, or mutually coupled
coils. The first matrix solution finds the node-voltage or
mesh-current vector in terms of matrix operations with the
inspection matrices. Also, this method gives a matrix solution
for any arbitrary output vector in terms of the node-voltage
or mesh-current solution vector, the independent-source vector,
and the inspection matrices. The second matrix solution method
finds the solution for a vector consisting of all node voltages or
mesh currents, dependent sources, controlling variables, and any
output variable@) using a single matrix equation. Matrix methods
of circuit analysts are now appropriate for student use because
of the existence of calculators capable of solving large matrices
and the availability of inexpensive math programs for personal
computers.