2. Components: products whose molecular composition does not change when the factory processes products can be called components, and there is no need for equipment with power supply capacity. It includes: resistance, capacitance and inductance. Circuit devices: diodes, resistors, etc. Connecting equipment: connectors, sockets, connecting cables, printed circuit boards.
3. Devices: Devices whose molecular structure changes during production and processing are called devices. This device is divided into active devices, and its main feature is that it consumes both electric energy and external power supply. Discrete devices, including bipolar transistors, field effect transistors, thyristors, semiconductor resistors and capacitors. Analog integrated circuit mainly refers to an integrated circuit composed of capacitors, resistors and transistors for processing analog signals. Digital integrated circuit is a digital logic circuit or system formed by integrating elements and wires on the same semiconductor chip.