Junction capacitance

Junction capacitance refers to the ability of a diode or transistor’s p-n junction to store electric charge. Think of it like a tiny capacitor formed within the semiconductor device. When a voltage is applied across the junction, it causes a change in charge storage, affecting how the device responds to signals. This capacitance varies with the voltage and the physical properties of the junction, impacting high-frequency performance. It’s an important factor in electronic circuits, especially in switching and radio frequency applications, where it influences signal timing and overall device behavior.