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What is the difference between a thyristor and a transistor? Is there any connection between them?

What is the difference between a thyristor and a transistor? Is there any connection between them?

September 05 , 2023 0

What Is Transistor

A transistor is a solid-state semiconductor device that can be used for detecting, rectifying, amplifying, switching, regulating, signal modulation and many other functions. Transistor as a variable switch, based on the input voltage, control the outgoing current, so the transistor can be used as a current switch, and general mechanical switch (such as Relay, switch) is different in that the transistor is the use of electrical signals to control, and the switching speed can be very fast, in the laboratory switching speed can reach more than 100GHz.
A transistor is a semiconductor device that contains two PN junctions inside and usually three lead electrodes outside. It is widely used for amplifying and switching electrical signals. Input stage and output stage are used transistor logic circuits, called transistor-transistor logic circuits, books and practical are referred to as TTL circuits, which belongs to a kind of semiconductor integrated circuits, which is most commonly used is TTL and non-gate. TTL and non-gate is a number of transistors and resistive components composed of a circuit system centralized in the manufacture of a very small silicon chip, encapsulated into a separate component. that is packaged into a single component. Semiconductor transistors are one of the most widely used devices in circuits, and are denoted by "V" or "VT" in circuits (the old symbols are "Q", "GB", etc.). GB", etc.).

Thyristor (Thyristor) is the abbreviation of the crystal thyristor, also known as silicon controlled rectifier, previously referred to as silicon controlled; thyristor is a PNPN four-layer semiconductor structure, it has three poles: anode, cathode and gate; thyristor operating conditions: plus positive voltage and gate trigger current; its derivatives are: fast thyristor, bi-directional thyristor, inverse conduction thyristor, photoconductive thyristor and so on. It is a high-power switching semiconductor. It is a high-power switching semiconductor devices, in the circuit with the text symbol for "V", "VT" said (the old standard with the letter "SCR" said).

　　Thyristor has the characteristics of silicon rectifier devices, can work at high voltage, high current conditions, and its work process can be controlled, is widely used in controlled rectification, AC voltage regulation, non-contact electronic switching, inverter and frequency conversion and other electronic circuits.

The Difference Between Transistor And Thyristor

(1) A transistor is a solid-state semiconductor device with various functions such as wave detection, rectification, amplification, switching, voltage regulation, and signal modulation. As a variable current switch, the transistor can control the output current based on the input voltage. Unlike ordinary mechanical switches (e.g. Relay, switch), transistors utilize electrical signals to control their own opening and closing, and the switching speed can be very fast, with switching speeds of up to 100GHz or more in the laboratory.

(2) thyristor, also known as silicon controlled, anode, cathode and control pole, which has four layers of PNPN semiconductor, three PN junction. Control pole without voltage, the anode (+), cathode (-) plus forward voltage between the non-conducting, cathode (+), anode (-) plus reverse voltage between the non-conducting, respectively, known as forward blocking and reverse blocking. Anode (+), cathode (-) plus forward voltage, control pole (+), cathode (-) plus a voltage trigger, the SCR conducts, at this time, the control pole to remove the trigger voltage, the SCR still conducts, known as triggered conduction. To turn off (not conductive), as long as the current is less than the maintenance current on the line, remove the forward voltage can also turn off.

The Structure Is Different

Transistor is a solid semiconductor device (including diodes, triodes, field effect tubes, thyristors, etc., sometimes specifically referring to bipolar devices).

Thyristor is a PNPN four-layer semiconductor structure, it has three poles: anode, cathode and gate.

Different Working Conditions

Transistors use electrical signals to control their own opening and closing, and the switching speed can be very fast.
Crystal thyristor working conditions: add positive voltage and gate pole trigger current.

Different Application Areas

Thyristor is widely used in controlled rectifier, AC voltage regulator, non-contact electronic switching, inverter and frequency conversion and other electronic circuits.

Transistors are more often used in the field of electronics.

Thyristor and its derivatives are: fast thyristor, bidirectional thyristor, reverse conduction thyristor, photocontrol thyristor and so on. Thyristor has the characteristics of silicon rectifier device, can work in high voltage, high current conditions, and its work process can be controlled.

Advantages Of Transistors In Comparison:

1. No consumption of components

No matter how good the tube is, it will gradually deteriorate due to changes in cathode atoms and chronic air leakage. With the advancement of material production and the improvement of many aspects, the life of transistor is generally 100 to 1000 times longer than that of electron tube, which can afford the reputation of permanent device.

2、Electricity consumption is very small

Only one-tenth or one-tenth of an electron tube, it does not need to heat the filament to produce free electrons like an electron tube. A transistor radio as long as a few dry batteries can be listened to half a year.

3、No need to warm up

It works as soon as it is turned on. For example, a transistor radio will sound as soon as it is turned on, and a transistor TV will appear on the screen as soon as it is turned on. Electronic tube equipment can not do this. After the power on, have to wait a while to hear the sound, see the picture. Obviously, transistors are very advantageous in military, measurement, recording, and other areas.