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Fuji electric electrical components refer to integrated circuits in which analog circuits composed of capacitors, resistors, transistors, and other components are integrated to process analog signals. There are many analog integrated circuits, such as operational amplifiers, analog multipliers, phase-locked loops, and power management chips. The main constituent circuits of analog integrated circuits include amplifiers, filters, feedback circuits, reference source circuits, and switched-capacitor circuits. Analog integrated circuit design is mainly achieved through manual circuit debugging and simulation by experienced designers, whereas corresponding digital integrated circuit design is mostly automatically synthesized under the control of EDA software using hardware description languages. Integrated circuits can be divided into two major categories based on their function and structure: digital IC and analog IC. Digital IC are used to generate, amplify, and process various digital signals (signals that vary discretely in time and amplitude). Analog IC are circuits used to generate, amplify, and process various analog signals (signals whose amplitude varies continuously with time). They are one of the core technologies of microelectronics and can acquire, amplify, compare, convert, and modulate analog quantities such as voltage or current.

Fuji electric electrical component structure

Inductors are generally composed of a bobbin, winding, shield, encapsulation material, magnetic core, or iron core. 1, Bobbin The bobbin refers to the support for winding the coil. For most large-sized fixed inductors or adjustable inductors (such as oscillator coils and choke coils), enameled wire (or silk-covered wire) is wound around the bobbin, and then a magnetic core, copper core, or iron core is inserted into the inner cavity of the bobbin to increase its inductance. Bobbins are usually made of plastic, bakelite, or ceramic and can be formed into different shapes according to actual needs. Small inductors (such as color-coded inductors) generally do not use bobbins; instead, the enameled wire is wound directly onto the magnetic core. Air-core inductors (also known as formless coils or air coils, mostly used in high-frequency circuits) do not use magnetic cores, bobbins, or shields. Instead, they are wound on a mold first, then the mold is removed, and a certain distance is maintained between the turns of the coil. 2, Winding A winding refers to a set of coils with specified functions and is the basic component of an inductor. Windings are classified into single-layer and multi-layer types. Single-layer windings come in two forms: close-wound (where each turn of wire is adjacent to the next during winding) and spaced-wound (where a certain distance is maintained between each turn of wire during winding). Multi-layer windings include layered flat winding, random winding, honeycomb winding, and other methods. 3, Magnetic Core and Magnetic Rod Magnetic cores and magnetic rods are generally made of materials such as nickel-zinc ferrite or manganese-zinc ferrite. They come in various shapes, including "I" shape, cylindrical, cap-shaped, "E" shape, and pot shape. 4, Iron Core Iron core materials mainly include silicon steel sheets and permalloy, and their shape is mostly "E" type. 5, Shield To prevent the magnetic field generated by some inductors during operation from affecting the normal operation of other circuits and components, a metal shield is added (such as the oscillator coil in semiconductor radios). Using a shield increases the loss of the coil and reduces the Q value. 13, Encapsulation Material After some inductors (such as color-coded inductors and color-ring inductors) are wound, the coil and magnetic core are sealed with encapsulation material. The encapsulation material is typically plastic or epoxy resin.

Fuji electric electrical component principle

The absorption film irradiated by infrared rays is a thin film with low heat capacity, allowing its temperature to rise easily. A cavity structure is located directly below the center of the substrate. This design ensures a temperature difference between the cold junction and the measuring junction. The thermocouple is composed of polysilicon and aluminum, connected in series. When the temperature at the measuring junction of each thermocouple rises, a thermoelectromotive force Vn is generated between the thermocouples, so the sum of their voltages can be obtained at the output terminal.

Fuji electric electrical component structure

The simplest switch consists of two metal pieces called "contacts." When the two contacts touch, they complete the current circuit; when they do not touch, the current path is open. When selecting contact metals, their resistance to corrosion must be considered, because most metals form insulating oxides after oxidation, preventing the contacts from working properly. Factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity must also be considered when selecting contact metals. Sometimes, corrosion-resistant metals are plated onto the contacts. Plating is generally applied to the contact surfaces to avoid performance degradation due to oxides. Sometimes, non-metallic conductive materials, such as conductive plastics, are used for the contact surfaces. In addition to contacts, switches have movable parts that make or break the contact. Switches can be classified into toggle switches, push-button switches, rocker switches, etc., based on the different movable parts, and the movable parts can also be other types of mechanical linkages.

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