forwardjännitettä

Forwardspänning, often translated as forward voltage, refers to the voltage that must be applied across a semiconductor device, such as a diode or a transistor, in the forward-biased direction to allow current to flow through it. For a diode, this voltage overcomes the internal potential barrier created by the p-n junction. Once this threshold voltage is reached, the diode begins to conduct current. The specific value of the forward voltage varies depending on the type of semiconductor material. For silicon diodes, this is typically around 0.7 volts, while for germanium diodes, it is usually around 0.3 volts. For light-emitting diodes (LEDs), the forward voltage is dependent on the color of the light emitted, with blue and white LEDs requiring higher forward voltages than red or green ones. In transistors, forward voltage is crucial for controlling the flow of current between the collector and emitter by applying a voltage to the base. Understanding and controlling forward voltage is fundamental in designing and analyzing electronic circuits.