Simulation and Analysis on Performance of Mixer Distortion for the Field Effect Transistor Mixer

The mixer distortion is simulated and analyzed by using the LTspice software. The influence of the different parameters such as static operating point, local oscillator voltage amplitude and load resistance on the output is studied by changing the circuit parameters. Whether the output signal is distorted or not comparative analysis between theoretical calculation and simulation by setting the useful signal with different frequencies and different amplitudes), local oscillator signal and interference signal. Through the simulation experiment, the simulation results can be displayed visually and intuitively, which can enhance students’ perceptual understanding of abstract index parameter, can master the debugging method of circuit performance, and can deepen students’ understanding of basic principles. The practice has proved that this visual simulation teaching method is beneficial to display the teaching contents from mixer and mixer distortion, improve learning interest and improve learning effect.