School of Information Engineering;
Shaanxi Institute of International Trade&Commerce;
Xi’an 712046;
Shaanxi;
China;
School of Physics and Electronic Engineering;
Xianyang Normal University;
Xianyang 712000;
Shaanxi;
China;
Wien oscillator; third-order quadrature oscillator; pathological element; extra X second-generation current-controlled conveyor; nodal admittance matrix expansion;