Subthreshold slope

The subthreshold slope is a key parameter in the characterization of field-effect transistors (FETs), particularly in the context of their operation in the subthreshold region, where the transistor is not fully on but still conducts a small current. The subthreshold slope is defined as the efficiency with which the gate voltage controls the subthreshold current. This region is important for low-power electronic circuits and is particularly relevant in the development of modern transistors, including MOSFETs.