Discrete semiconductor devices are based on semiconductor materials and adjust their conductivity by controlling the doping concentration and structure of these materials. Discrete devices have a single function or a specific function. Their basic unit is the PN junction, which is used in various electronic circuits to achieve signal amplification, switch control, signal modulation, and other functions. Common classifications include diodes, transistors, field-effect transistors (FETs), thyristors, etc. It is important to note that there may be some degree of variability in the parameters of discrete devices, which can affect the stability and consistency of the circuit. Therefore, special attention should be given to this issue during the design and debugging process.