Semiconductor devices are the backbone of modern electronic systems, facilitating a wide range of functionalities from signal processing to power management. Composed of semiconductor materials like silicon, gallium arsenide, and silicon carbide, these devices operate based on the principles of semiconductor physics, particularly the behavior of electrons and holes within these materials.
Semiconductor devices can be broadly classified into two categories: **active** and **passive** components. Active components, such as diodes, transistors, and integrated circuits, are capable of controlling electric current. In contrast, passive components like resistors and capacitors do not provide gain or control over current flow. Among active components, transistors play a critical role in amplifying signals and switching applications, serving as the fundamental building blocks of digital circuits.
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