Electronics: The definition and use of diodes, triode, and transistor? What are the functions of them often used on, and what are the functions?

The transistor includes the diode triode, of course, there are still many! The diode is one -way, that is, the positive direction and the reverse cut off. The triode is generally used in the analog circuit to enlarge it. The digital circuit is used as a switch
This crystal pipes. Basically Electric and ordinary light bulbs are the same as those who do not belong to the electronics industry). The easiest is that the mobile phone charger has a diode for rectification, which transforms AC electricity to DC (strictly speaking is pulse DC power, and it is a DC power after consideration.) Components, I won’t say it here.

You can find KE./View/1016 when you go here. Only the diodes are introduced here. You can find others, especially comprehensive.

Diode definition:
The diode is also called the crystal diode, referred to as diode (Diode); it only transmits electronic parts in one direction. It is a device with a two -terminal with 1 part number. It has the direction of increased the voltage in the external voltage to make the current or not flow. The crystal diode is a P-N knot formed by a P-N-type semiconductor and N-type semiconductor. A spatial charge layer is formed on both sides of the interface, and a self-built electric field is built. When there is no external voltage, the diffusion current caused by the load concentration difference between the two sides of the P-N knot and the drifting current caused by the self-built electric field are equal to the electrical balance.

The application of diode:
1. Rectifier diode
It using the one -way conductivity of the diode, the AC electricity that alternates the direction can be transformed into a single direction pulse DC electricity.
2. Switching components
The resistance of the diode under the actual voltage is very small, in a state of diverting, which is equivalent to a connected switch. Under the influence of the reverse voltage The state is like a disconnected switch. Using the switching characteristics of the diode can form various logical circuits.
3. Limited parts
After the positive direction of the diode, its forward voltage drop basically remains unchanged (the silicon tube is 0.7V and the pipe is 0.3V). Using this feature, as a limited element in the circuit, the signal amplitude can be limited within a certain range.
4. The secondary diode of the secondary pipe
The secondary flow in the inductance and relay of the switching power supply and relay.
5. The detection diode
The functional wave role in the radio.
6. Transformer diode
It is used in the high -frequency header of the TV.
7. Display components
used on display such as VCD, DVD, calculator.

The definition of triode:
The triode (also known as crystal tube) in Chinese meaning is just a collective name for the magnifying devices of three pins. Several devices,
, can be seen that although they are all called triode, in fact, in English [1], the saying is very different. Electronic triode Triode This is the only English translation of the word “triode” in the English Chinese dictionary. This is the earliest relationship with the electronic triode, so it is preconceived, and it is also the item originally referred to in the term. Things that are called tritoly in Chinese in Chinese, they must not be translated into Triode in actual translation. Intersection Intersection
The electronic triode Triode (commonly known as a type of electronic tube)
The bipolar transistor BJT (BIPOLAR JUNCTION)
The Junction Gate FET (Field Effect)
Semiconductor field effect transistor MOS FET (Metal Oxide Semi-Contctor Field Effect) English full name
V-type groove field effect tube VMOS (vertical metal oxide)
Note: The three look like field effects, In fact, the structure is very different
The effects of the type of the metal oxide semiconductor field effect of the type of the type of the field of the type of the vitamin V channel field effect tube is the unipolar structure. The UNIPOLAR JUNCTION
They -type J -type field effect tube is an insulating field effect tube. MOS FET and VMOS are both insulating field effect tubes
VMOS is a kind of improvement on the basis of MOS improved Large current, high -release large multiple (cross -road) new power transistor, the difference is to use V -shaped grooves to greatly improve the magnifying coefficient and working current of the MOS tube, but at the same time, it also greatly increases the input capacitance of MOS. It is a MOS tube. Species high -power change products, but the structure has been huge differences with the traditional MOS. VMOS only has an enhanced type without the exhaustive MOS tube unique to MOS.

The definition of transistor:
Crystal tube () is a solid semiconductor device that can be used for detection, rectification, magnification, switching, voltage voltage, signal modulation and many other functions. As a variable switch, the transistor is a variable switch, based on the input voltage, the current flows out of the current. Therefore, the transistor can be used as a current switch, which is different from the general mechanical switch (such as Relay, Switch). The speed can be very fast, and the switching speed in the laboratory can reach more than 100GHz.

The purpose of the transistor:
The crystal tube. The real name is the semiconductor triode. It is a semiconductor device with two PN knots inside. It has an enlarged and switching effect on electrical signals, and its application is widely used. Both the input and output levels use the logic circuit of the transistor, called the transistor -crystal tube logic circuit. Books and practical are referred to as TTL circuits. It belongs to a semiconductor integrated circuit. The most common is TTL and non -door. TTL and non -doors are the circuit systems composed of several transistors and resistors composed of several crystal pipes and resistance elements on a small silicon wafer, encapsulated into an independent component. Crystal tube is one of the most widely used devices in semiconductor triode. In the circuit, in the circuit It is represented by “V” or “VT” (the old text symbol is “Q”, “GB”, etc.).
The crystal tube is considered one of the greatest inventions in modern history. It can be compared with the invention of printing, cars and telephones in terms of importance. Crystal pipes are actually key activities (Active) components of all modern electrical appliances. The importance of transistor in today’s society is mainly because the transistor can use the process of highly automated process for large -scale production capacity, so it can incredible the cost of unit cost. rn　　虽然数以百万计的单体晶体管还在使用，绝大多数的晶体管是和二极管|-{A|zh-cn:二极管;zh-tw:二极体}-，电阻，电容Together on the micro -chip (chip) to create a complete circuit. The simulated or numbers or the two are integrated on the same chip. The design and development of a complex chip is quite high, but when it is allocated to the usual millions of production units, the price of each chip is the smallest. A logical door contains 20 transistors, while the number of transistors used in a high -end microprocessor in 2005 reached 289 million.
The low cost, flexibility and reliability of the transistor make it a universal device for non -mechanical tasks, such as digital calculations. In terms of controlling electrical appliances and machinery, the transistor circuit is also replacing motor equipment, because it is usually cheaper, and more effective uses only the standard integration circuit and writing computer programs to complete the same mechanical task. Effective mechanical control.
The tide of digital information because of the low cost of the transistor and the later electronic computers. Because the computer provides fast search, classification, and processing digital information, in- {a | zh-cn: information; zh-tw: information}-{a | zh-cn: number; zh-tw: digit}- Division has invested more and more energy. Many media today are published in electronic forms, and eventually transform and present as simulation forms through computer transformation and presentation. The areas affected by the digital revolution include TV, broadcasting and newspapers.
The semiconductor triode contains two PN knots inside, and the external semiconductor device is usually used to lead the electrode. It has an enlarged and switching effect on electrical signals, and its application is widely used. Both the input and output levels use the logic circuit of the transistor, called the transistor -crystal tube logic circuit. Books and practical are referred to as TTL circuits. It belongs to a semiconductor integrated circuit. The most common is TTL and non -door. TTL and non -doors are the circuit systems composed of several transistors and resistors composed of several small silicon wafers, and they are packaged into an independent component. The semiconductor triode is one of the most widely used devices in circuits. In the circuit, it is represented by “V” or “VT” (the old text symbol is “Q”, “GB”, etc.).
The semiconductor triode is mainly divided into two categories: bipolar crystal tube (BJT) and field effect transistor (FET). There are three poles of the transistor; the three poles of the bipolar crystal tube are composed of EMITTER, base pole, and collector (Base), respectively; Source, gate, and drain. Because there are three polarity in the crystal tube, there are also three ways to use, namely the emission pole ground (also known as the large and CE configuration), the base ground ground, and the collector ground. The most commonly used use should be a signal amplification aspect, followed by impedance matching, signal conversion, etc., etc. The transistor is a very important component in the circuit. Many precision components are mainly controlled by crystals.
This Tube’s in-depth triode is in a state of amplification or switching. It depends on the DC partial crystal of the triode base. As this current changes, the working status of the triode changes from the delay-linear region-saturated state change. If When the transistor IB (DC bias point) is certain, the transistor work is online. At this time The triode will work in the switch state.
The triode is working in saturated state 1 during the use of switching tube, and it is not very scientific with amplification state 1.
Please compare the IB of the triode manual; refer to my answer to understand the working status of the triode.
If when the triode is not added with DC bias, when the AC sinusole signal entered when enlarged the circuit is half weeks, the basal pole is positive to the emission pole. Because the launching knot is added with reverse voltage, there is no base pole at this time without the base pole. The current and the setting electrode current. The pole is passed by the set electrode. At this time, the changes in the hagement electrode current are the same as the basis. When the triode is not added with the DC bias, the triode BE knot and CE knot conduction are not added. The transistor amplification circuit will only have half a wave output.
NPN transistor schematic diagram
The crystal tube is considered one of the greatest inventions in modern history. It can be compared with printing, cars and telephones in terms of importance. Crystal pipes are actually key activities (Active) components of all modern electrical appliances. The importance of transistor in today’s society is mainly because the transistor can use the process of highly automated to carry out large -scale production capacity, so it can incredible the cost of unit cost.
Although millions of monomer crystals are still in use, most of the transistors are assembled on the micro chip (chip) together with resistors and capacitors to create complete circuits. The simulated or numbers or the two are integrated on the same chip. The cost of designing and developing a complex chip is quite high, but when it is allocated to the usual millions of production units, the price of each chip is the smallest. A logical door contains 20 transistors, while the number of transistors used in a high -end microprocessor in 2005 reached 289 million.
The low cost, flexibility and reliability of the transistor make it a universal device for non -mechanical tasks, such as digital calculations. In terms of controlling electrical appliances and machinery, the transistor circuit is also replacing motor equipment because it is usually cheaper and more effective. It only uses standard integrated circuits and compiles computer programs to complete the same mechanical task, and uses electronic control instead of designing a one. Equivalent mechanical control.
The low cost of the transistor and the wave of later electronic computers and digital information came. Due to the ability to quickly search, classify, and process digital information, computers have invested more and more energy in digitalization of information. Many media today are published in electronic forms, and eventually transform and present as simulation forms through computer transformation and presentation. The areas affected by the digital revolution include television, radio and newspapers.