Its content covers the basic content of the circuit course of electrical specialty, which is slightly expanded in some aspects. It concentrates the traditional basic contents and also contains some basic contents of modern circuit theory.

The specific contents include: circuit elements and circuit laws; Analysis method of simple resistance circuit: general analysis method of linear resistance circuit: some theorems of circuit: resistance circuit with operational amplifier; Capacitive element and inductive element; First-order circuit; Second-order circuit; Application of step response, impulse response and convolution integral; Steady-state analysis of sinusoidal current circuit: circuit with mutual inductance element: frequency response of circuit; Three-phase circuit; Steady-state response of the circuit under periodic excitation: Fourier transform and Laplace transform; Two-port network; Network graph theory foundation; State variable method and so on.