KollektorströmmenLjuset

KollektorströmmenLjuset is a term that translates from Swedish to English as "collector current light." It generally refers to the measurement of current flowing into the collector terminal of a bipolar junction transistor (BJT) that is influenced by the intensity of light. This phenomenon is typically observed in phototransistors, a type of bipolar transistor that is sensitive to light.

In a phototransistor, the base-region of the transistor is exposed to light. When photons strike this base region, they generate electron-hole pairs. These charge carriers are then swept into the base and collector regions, effectively acting as a small base current. This amplified base current then controls a much larger collector current, analogous to a normal BJT where a small base current controls a larger collector current.

Therefore, "kollektorströmmenLjuset" quantifies this light-dependent collector current. As the intensity of the incident light increases, more photons are absorbed, generating more charge carriers in the base. This results in a larger effective base current and, consequently, a larger collector current. Conversely, as the light intensity decreases, the collector current diminishes. This property makes phototransistors useful in applications such as light sensors, optical switches, and optocouplers. The term highlights the direct relationship between ambient light levels and the transistor's collector current.