Transistor notes
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A transistor is a semiconductor device that can amplify or switch electronic signals and power by using a voltage or current applied to one pair of terminals to control the current through another pair of terminals. It is composed of semiconductor material with three terminals - the emitter, base, and collector. Transistors use a sandwich of p-type and n-type semiconductor materials and can be NPN or PNP types. They are commonly used in integrated circuits and have replaced vacuum tubes in most modern electronics due to being more durable, having a longer life, consuming less power, and not requiring a heating element.
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DELD Unit 1 BJTKanchanPatil34
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The transistor is a semiconductor device with three terminals - the emitter, base, and collector. Current flowing into the base terminal controls the flow of current between the emitter and collector terminals, allowing transistors to function as amplifiers or switches. Transistors come in two main types - bipolar junction transistors (BJT) which use both electrons and holes as current carriers, and field effect transistors (FET) which use an electric field to control the flow of electrons or holes in a channel. BJTs contain two pn junctions and come in npn or pnp varieties, while FETs use a gate to modulate the conductivity of a channel between source and drain terminals.semiconductor ,n- p type semiconductor ,forward biased and reverse biased
semiconductor ,n- p type semiconductor ,forward biased and reverse biasedSHRI RAM KRISHNA GUIDANCE CENTER
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semiconductor ,n- p type semiconductor ,forward biased and reverse biased TRANSISTOR.pptx
TRANSISTOR.pptxSyedSaifuddin30
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Transistors are three-terminal electronic components made of semiconductor material that control the flow of current in circuits. There are two main types: NPN transistors, which have two blocks of N-type semiconductor and one block of P-type; and PNP transistors, which have one block of N-type and two blocks of P-type. Transistors have three terminals - the emitter supplies charge carriers to the base, the collector collects carriers from the base, and the base controls the flow. Transistors are used in many applications like oscillators, compact discs, hearing aids, switches, and as the basic building blocks of computer processors. Modern computer processors can contain billions of transistors on a single chip.Transistor, its working and Applications
Transistor, its working and ApplicationsSajawalNawaz2
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The document discusses transistors, their working, types, and applications. A transistor is an electronic component that uses semiconductors to amplify or switch electrical signals and power. It has three terminals called the emitter, base, and collector. Transistors come in different types like bipolar junction, field effect, etc. and are classified as NPN or PNP depending on the arrangement of N-type and P-type semiconductors. The document describes how NPN and PNP transistors work by controlling the flow of current between the emitter and collector using the base. Finally, it lists some common applications of transistors like as a switch, circuit element, and amplifier.Assignment_3.1_BJT and BJT Amplifiers.pptx
Assignment_3.1_BJT and BJT Amplifiers.pptxGABRIELABRAMJOPIA1
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The document discusses the bipolar junction transistor (BJT) including its history, working principle, types (PNP and NPN), and biasing techniques. Key points:
- BJTs were invented in 1947 and replaced vacuum tubes, making electronics smaller and more reliable. They consist of P-type and N-type semiconductor materials.
- In a BJT, the base terminal controls the flow of current between the emitter and collector. It works by having one junction forward biased and the other reverse biased.
- The two types are PNP, where the emitter is more positive than the base and collector, and NPN, where the connections are reversed.
- BJT biassemiconductor ,n- p type semiconductor ,forward biased and reverse biased
semiconductor ,n- p type semiconductor ,forward biased and reverse biasedSHRI RAM KRISHNA GUIDANCE CENTER
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Transistor notes
- 1. Transistor Made by - priyank jain
- 3. introduction • A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals., a transistor can amplify a signal. found embedded in integrated circuits.
- 4. Transistor • Transistor are electrical device, which utilize a sandwich of p and n type of semi conductor materials. • It can be NPN or PNP types
- 5. Transistor • It has got 3 parts : • emitter • Base • Collector.
- 6. • One of the n type at the left is emitter • Right is collector • And central p type is the base
- 7. • When contact is being made between materials in case of NPN transistor PD develops at their junction and the emitter and collector being positive relative to the base.
- 8. Transistor • When the device is connected to a source of EMF, with the emitter negative and the collector positive, no current flows unless the EMF exceeds the critical value, as the electrons are unable to pass from the negative p-type to the positive n-type semiconductor, so cannot cross the base collector junction.
- 9. Transistor • A second source of EMF is connected to the base and the emitter, the base being positive relative to the emitter. • The electron can pass from the negative n type to the positive p-type • So the current flows across the base collector junction.
- 10. Transistor • In the circuit’ there is a thick layer of n-type semiconductor, a thin layer of p-type semiconductor’ so the current consist largely of the movement of electrons from the emitter soon pass into the base
- 11. Transistor • The base has now an adequate supply of electrons, and as it is very thin these come close to the base collector junction, and are attracted into the collector, to replace those that had migrated into the base.
- 12. Transistor • This reduces the barrier effect across the base-collector junction, and current flows across the transistor. • Thus a current fed into he base current, causes greater variation of current flowing across the transistor.
- 13. Transistor • In this respect the current fed into the base of the transistor has an effect, comparable to that of a positive charge applied to the grid of a triode valve.
- 14. Transistor • Uses of transistor • Transistor are used in preference to the valve in most modern equipment, as they are durable, have a long life, consume less power and need no heating device. • As the power output is limited they are suitable for use in the production of low frequency but fail to produce high frequency currents e.g. SWD
- 15. Thank you Priyank jain