Passive components

Electronic circuits have both active and passive devices. Like ICs, passive components are located upstream in the entire computer industry and are an essential component of electronic products. The so-called passive components can operate without being connected to electricity, and have the functions of regulating current and voltage, storing static electricity, preventing electromagnetic interference, and filtering current impurities. With respect to the active component, when the voltage of the passive component changes, neither the resistance nor the impedance will change. Passive components can cover three major categories of products: resistors, inductors, and capacitors.

The following are separately introduced:

1 Resistor: The function of the resistor is to regulate the voltage and current in the circuit. It can be divided into three categories according to the materials and product packaging methods.

1.1 Fixed non-chip resistors: This product is mainly used to handle power or signal power, and the largest demand for electronic products such as power supplies and monitors. [Application Surface]: Power Supply, Monitor 1.2 Fixed Chip Resistors: These resistors are widely used in information, communications, consumer electronics and various instruments. [Application surface]: Information, communication, consumer electronics and various instruments 1.3 Thermistors and variable resistors: Mainly used in temperature sensing or control, motor protection and activation devices, and overcurrent/voltage protection devices. [Application surface]: Temperature sensing or control, motor protection and activation device, and overcurrent/voltage protection device 2 Capacitors: When the two conductive substances are separated by medium, the capacitor used to store the static electricity that may be generated. There are many kinds of capacitors, and depending on the materials used, they can be divided into more than 30 kinds. The domestic manufacturers mainly produce aluminum electrolytic capacitors, ceramic capacitors and plastic film capacitors. Among them, what investing adults most often see in the report is one of the ceramic capacitor-laminated ceramic capacitors (MLCC). Basically, ceramic capacitors can be divided into two types, one is a single-layer ceramic capacitor, and the other is a laminated ceramic capacitor (MLCC). Because of its small size, large relative capacitance, low loss at high frequency, and high stability, the MLCC looks promising in the light and thin future of electronic products. It is mainly used in motherboards, notebook computers, and mobile phones. Scanners, optical drives, modems, etc. [Application surface]: Motherboard, notebook, mobile phone, scanner, optical drive and modem 3 Inductors: The ability of a coil to store energy in the form of a magnetic field is called inductance. This coil is called an inductor. The main function of the inductor is to prevent the interference of electromagnetic waves and filter the noise in the current. The scope of use is extremely wide. However, the domestic production of chip inductor technology and scale is still insufficient, and there is no professional manufacturer of inductors. [Application side]: Main board, personal computer (PC), scanner, power supply, monitor, switch, telephone, modem, various audio-visual equipment.