Traditional classification is basically divided into two categories:
First, active devices, mostly semiconductor components, such as diodes, triodes, integrated circuits, memories, etc. , you must add DC to work.
The second is passive devices, such as capacitors, resistors and inductors.
In addition, connectors, switches, etc. It is also a wide range of electronic components. This classification itself is not very strict, it is developing.
What are the electronic components and what is the purpose of each component?
Commonly used electronic components are: resistors, capacitors, inductors, potentiometers, transformers, diodes, triodes, mos transistors, integrated circuits, etc.
1. Resistance
The resistance of a conductor to current is called its resistance. Substances with low resistance are called electrical conductors, or conductors for short. Substances with high resistance are called electrical insulators, or insulators for short. In physics, resistance is used to indicate the resistance of a conductor to current. The greater the resistance of a conductor, the greater the resistance of the conductor to current. Different conductors generally have different resistances, and resistance is the nature of the conductor itself.
The resistance of a conductor is usually represented by the letter R. The unit of resistance is ohm, abbreviated as ohm, and the symbol is ω (Greek letter, transliteration is pinyin, and pronunciation is not u mg m). The larger units are kiloohm (kω) and megaohm (mω) (trillion = million, that is, 1 million).
2. Capacitance
Capacitance (or capacitance) is a physical quantity, which indicates the capacity of a capacitor to hold charge. We will increase the potential difference between the two plates of the capacitor by 1 volt, which is called the capacitance of the capacitor. Physically speaking, a capacitor is an electrostatic charge storage medium (just like a bucket, you can charge it). In the absence of a discharge circuit, the self-discharge effect/electrolytic capacitance is obvious, and the charge may exist forever, which is its characteristic). It has a wide range of uses and is an indispensable electronic component in the fields of electronics and electric power. Mainly used in power supply filtering, signal filtering, signal coupling, resonance, DC isolation and other circuits. The symbol of the capacitor is C.
C=εS/4πkd=Q/U
In the international system of units, the unit of capacitance is farad, and the symbol is F. Commonly used capacitance units are millifarad (mF), microfarad (μF), nanofarad (nF) and picofarad (pF). The conversion relationship is as follows:
1 farad (F)= 1000 millifarad (mF)= 1000000 microfarad (μF)
1 microfabrication (μF)= 1000 nanofarads (nF)= 1000000 picofarads (pF).
3. Inductance coefficient
Inductor is an element that can convert electric energy into magnetic energy and store it. The structure of inductor is similar to that of transformer, but there is only one winding. Inductor has a certain inductance, which only prevents the change of current. If the inductor is in a state where no current passes, it will try to stop the current from flowing through it when the circuit is connected; If the inductor is in a state of current flow, it will try to keep the current constant when the circuit is disconnected. Inductors are also called chokes, reactors and dynamic reactors.
4. Potentiometer
Potentiometer is a resistance element with three terminals, and its resistance value can be adjusted according to a certain change law. Potentiometers usually consist of resistors and movable brushes. When the brush moves along the resistor, the resistance value or voltage related to the displacement is obtained at the output end. Potentiometers can be used as both three-terminal elements and two-terminal elements. The latter can be regarded as a variable resistor.
Potentiometer is an adjustable electronic component. It consists of a resistor and a rotating or sliding system. When a voltage is applied between two fixed contacts of a resistor, the position of the contacts on the resistor can be changed by rotating or sliding the system, and a voltage related to the position of the moving contact can be obtained between the moving contact and the fixed contact. When the potentiometer is a four-terminal element, it is mainly used as a voltage divider. Potentiometer is basically a sliding rheostat, there are several styles, which are generally used to adjust the volume switch of the speaker and the power of the laser head.
5. Transformer
Transformer is a device that uses electromagnetic induction principle to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer) and so on.
Transformers are often used for boosting, impedance matching, safety isolation, etc.
6. Diodes
Diodes are electronic components with two electrodes, which only allow current to flow in one direction. Many uses are to apply its rectification function. And a varactor (v ......
What are the classifications of electronic components?
Introduction of electronic components: Electronic components are the general name of components and devices. Electronic components: refers to the finished products whose molecular composition does not change in the process of factory production and processing. Such as resistors, capacitors and inductors. Because it does not produce electrons and has no control and transformation effect on voltage and current, it is also called passive device. Electronic components: refers to the finished products whose molecular composition does not change in the process of factory production and processing. Such as resistors, capacitors and inductors. Because it does not produce electrons and has no control and transformation effect on voltage and current, it is also called passive device. Electronic device: refers to the finished product whose molecular structure changes in the process of factory production and processing. Such as transistors, electron tubes and integrated circuits. Also known as active devices, because it can generate electrons, control and transform voltage and current (amplification, switching, rectification, detection, oscillation and modulation, etc. According to the classification standard, electronic devices can be divided into 12 categories, which can be summarized as vacuum electronic devices and semiconductor devices. The development history of electronic components is actually a condensed history of electronic development. Electronic technology is a new technology developed at the end of 19 and the beginning of the 20th century. It developed most rapidly and was widely used in the 20th century, and became an important symbol of the development of modern science and technology. The electronic component industry is mainly composed of electronic component industry, semiconductor discrete devices and integrated circuit industry.
What are the classifications of electronic components?
Electronic components industry is a very extensive industry, including quite complicated things. Now let's take a brief look.
There are various products, such as:
(1) relay
Automobile relay | signal relay
Solid-state relay
Electromagnetic relay
Wet reed relay
High-power relay
Magnetic latching relay polarization relay
Temperature relay | vacuum relay
Time relay | hybrid electronic relay
Time delay relay | other relay
⑵ diode
Switching diode | ordinary diode
Schottky diode
Bidirectional trigger diode
Photodiode | damping diode
Magnetosensitive diode | rectifier diode
Light emitting diode | laser diode
Varactor diode detection diode
Other diodes
(3) Triode
Band-stop triode
Switching transistor | thyristor
Low-noise amplifier transistor
| Low-frequency, high-frequency and microwave power transistors | Switching triodes
Photosensitive triode
Darlington triode with high back pressure
Phototransistor | low frequency amplifier triode
Power switching transistor | other triodes
(4) Electronic special materials
Special plate material for capacitor | conductive material
Electrode material | optical material | temperature measuring material
Semiconductor material | shielding material
Vacuum electronic material | copper clad laminate material
Piezoelectric crystal material | electronic ceramic material
Photoelectric functional materials | strong and weak current contact materials
Laser working medium | Special film material for electronic components
Electronic glass | Diamond-like carbon film
Expansion alloy and thermal bimetal | electrothermal materials and electrothermal elements
Other electronic special materials
5] Capacitor
Mica capacitor aluminum electrolytic capacitor
Vacuum capacitor paint capacitor
Composite dielectric capacitor | glass glaze capacitor
Organic thin film capacitor | conductive plastic potentiometer
Infrared thermistor | gas thermistor
Ceramic capacitor tantalum capacitor
Paper capacitance electronic potentiometer
Magnetoresistance/potentiometer | humidity resistor
Photosensitive resistor/potentiometer fixed resistor
Variable resistor | row resistor
Thermistor fuse resistance
Other resistors/potentiometers
[6] connector
Terminal | harness | card holder
Integrated circuit socket | optical fiber connector
Terminal | cable connector
Printed circuit board connector | computer connector
Mobile phone connector | terminal board and terminal board
| Other connectors
Primary potentiometer
Synthetic carbon film potentiometer | direct sliding potentiometer
Chip potentiometer | metal film potentiometer
Solid potentiometer | Single-turn and multi-turn potentiometer
| Single-connection and Double-connection Potentiometers | Potentiometers with switches
Wire wound potentiometer | other potentiometer
As a safety component
Temperature switch | temperature fuse
Current fuse | fuse holder
Self-healing fuse | Other safety components
Levies sensor
Electromagnetic sensor | sensitive element
Photoelectric sensor | optical fiber sensor
Gas sensor | humidity sensor
Displacement sensor | vision and image sensor
Other sensors
⑽ sensor
Magnetic beads | current transformer | voltage transformer
Induction coil | fixed inductor | adjustable inductor
Linear Rao inductor
Choke inductor (choke coil, choke coil)
Other inductors
⑾ electroacoustic device
Speaker | microphone | pickup
Microphone | receiver | buzzer
⑿ electroacoustic part
| Electro-acoustic horn | Dust cover of basin frame |
| Sound film, diaphragm | Other electro-acoustic accessories
Elastic wave of iron | magnetic steel |
| drum paper | blanking | electroacoustic mesh cover
[13] frequency element
Frequency divider oscillator filter
Resonator frequency modulator frequency discriminator
Other frequency components
[14] switching element
SCR ......
What are the electronic components?
So all kinds of components are called diodes, triodes, capacitors, resistors, varistors, led lamps, MOS tubes, IC, inductors, magnetic beads, connectors and so on.
What are electronic components?
Electronic components are the general name of components and devices. Electronic components: refers to the finished products whose molecular composition does not change in the process of factory production and processing. Because it does not produce electrons and has no control and transformation effect on voltage and current, it is also called passive device. According to the classification standard, electronic components can be classified into 1 1. Electronic device: refers to the finished product whose molecular structure changes in the process of factory production and processing. Refers to electron tubes and transistors, and now generally refers to basic electronic products made of semiconductor materials, such as diodes, triodes, field effect tubes, integrated circuits and so on. Other basic parts used in the manufacture of electronic equipment are called components, such as resistors, capacitors, inductors, etc. So it is also called active device. According to the classification standard, electronic devices can be divided into 12 categories, which can be summarized as vacuum electronic devices and semiconductor devices. Due to the continuous emergence of new materials and technologies, the boundaries between modern electronic components and devices have become blurred. According to the classification standard, electronic devices can be divided into 12 categories, which can be summarized as vacuum electronic devices and semiconductor devices. Explanation of electronic components: COB(Chip On Board) fixes the ic die on the printed circuit board through help; COF(FPC chip) fixes the chip on TCP; COG (Chip on Glass) fixes the chip on the glass; El (electroluminescence) electroluminescence; The EL layer consists of high molecular weight flakes. EL light source FTN(formulated STN) used as LCD adds a layer of optical path compensation sheet on STN, which is used for Quad Flat Package of black and white display LED (light emitting diode) PCB (printed circuit board) printed circuit board QFP.
What do electronic components contain?
You asked the right person. We Shanghai Ruishu Electronics are electronic components! Electronic components mainly include resistors, capacitors, diodes, triodes, thyristors, touch switches, liquid crystals, light-emitting diodes, buzzers, various sensors, chips, relays, transformers, rheostats, fuses, optocouplers, filters, connectors, motors, antennas, etc. If you really don't know during the interview, tell the other person frankly that you don't know much about it either! Honesty is more reliable than pretending to know!
What materials are all electronic components made of?
I am at a loss to see this question, too general. Tell me what I know.
Common resistances: carbon film resistance (carbon ink, graphite) and metal film resistance (special metal or alloy).
Capacitors are a bit complicated, and most of them are metal films. Different capacitors have different dielectrics.
An inductor is basically a coil, some of which are magnetic cores or iron cores, and some are hollow.
The main materials of transistors are mostly silicon or germanium. The main materials of integrated circuits are basically silicon, and the main electronic components are basically these. I hope it helps you.
What kinds of electronic glue are there? What electronic components are used?
Dover deep electric adhesive can be roughly divided into: 1, SMT/SMD/SMC electronic adhesive-patch red adhesive, and low-temperature curing adhesive. Dover series patch adhesives are epoxy adhesives (rapid thermal hardening), and some of them have high shear dilution viscosity characteristics, so they are suitable for high-speed surface patch assembly machine (drum type) dispensing machines, especially for various ultra-high-speed dispensing machines (such as HDF). Dover series low temperature curing adhesive is an improved epoxy resin adhesive with one component and low temperature curing. This product is used for low-temperature curing and can form the best adhesion between various materials in a very short time. The product has excellent working performance and high storage stability, and is suitable for memory cards, CCD/CMOS and other devices. It is especially suitable for heat-sensitive elements that need low-temperature curing. 2.COB/COG/COF electronic adhesive-cofferdam filling adhesive, COB bonded vinyl Dover series cofferdam filling adhesive series one-component epoxy adhesive, suitable for ic packaging of epoxy glass substrate, such as battery circuit protection board and other products. The product has excellent welding resistance and moisture resistance, low thermal expansion coefficient to reduce deformation, excellent temperature cycling performance and good fluidity. Dover adhesive black glue is a one-component epoxy resin glue, which is the best supporting product for IC bonding. Specially used for flexible packaging of IC electronic crystals, suitable for various electronic products, such as calculators, PDA, LCD, meters and so on. It is characterized by high fluidity, easy dispensing and low glue point height. After curing, it has the characteristics of flame retardant, bending resistance, low shrinkage and low moisture absorption, which can provide effective protection for IC. The design of this encapsulant is a high-quality product developed after long-term temperature/humidity/power-on test and thermal cycle. 3.BGA/CSP/WLP electronic adhesive-underfill Dover series underfill is a kind of underfill used in CSP & amp； BGA underfill technology. It can form a consistent and defect-free underfill layer, and can effectively reduce the overall temperature expansion characteristic mismatch between the silicon wafer and the substrate or the impact caused by external force. The lower viscosity makes it more suitable for bottom filling; High fluidity enhances the operability of its repair. 4.MC/CA/LE/EP packaging material-conductive silver glue Dover series conductive silver glue is a one-component epoxy conductive adhesive with silver powder as the medium. It has the characteristics of high purity, high conductivity, low modulus and long working time. These products have excellent storage stability at room temperature, low curing temperature and low ion impurity content, and the cured products have good electromechanical properties and thermal stability. The products have been successfully applied to the conductive bonding of LED, LCD, quartz resonator, chip tantalum capacitor, VFD, ic and so on. And is suitable for printing or distribution process. 5. Special silicone electronic packaging materials-Special silicone potting/adhesive materials Silicone adhesives are used in many assembly processes. Silicone is widely used in solar energy, lighting equipment, household appliances and other assembly industries because of its weather resistance, ultraviolet aging resistance and high temperature resistance. Call me if you need me-Shenzhen 86284745
What do you mean by electronic components and electronic components?
Electronic components: parts of machines and instruments, usually consisting of several parts, which can be used in similar products.
Electronic original: refers to a single part.