kynnysjännitykseen
Kynnysjännitys, known in English as threshold voltage, is a fundamental concept in semiconductor physics and electronics, particularly concerning field-effect transistors (FETs). It represents the minimum gate voltage required to create a conducting channel between the source and drain terminals of a FET. Below this voltage, the transistor is in an off-state, meaning very little current flows through it. Above the threshold voltage, the gate voltage electrostatically attracts charge carriers to the semiconductor-insulator interface, forming a conductive path that allows current to flow.
The value of the threshold voltage is crucial for determining the operating characteristics of a transistor.