BJT vs FET | Saif khan babar
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This document compares and contrasts Bipolar Junction Transistors (BJTs) and Field Effect Transistors (FETs). It discusses the basic structure and functioning of NPN and PNP BJTs, as well as common types of FETs like JFETs and MOSFETs. The key differences highlighted are that BJTs use both majority and minority charge carriers, while FETs use only majority carriers controlled by an electric field. Additionally, BJTs are current-controlled devices and FETs are voltage-controlled. The document also provides diagrams to illustrate the flow of electrons and holes in each type of transistor.
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FIELD EFFECT TRANSISTERS (FET)
Types of Field Effect Transistors
i) Junction field effect transistor (JFET)
(ii) Metal oxide semiconductor field effect transistor (MOSFET)
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Field-effect transistors (FETs) are voltage-controlled semiconductor devices that rely on an electric field to control the shape and conductivity of a channel in the semiconductor material. The basic principle of FETs involves three terminals - the gate, source, and drain - where a voltage applied to the gate controls the current flow between the source and drain terminals. There are two main types of FETs: junction FETs (JFETs) which have a doped semiconductor channel, and metal-oxide-semiconductor FETs (MOSFETs) which use a metal gate separated from the channel by an oxide layer. FETs can be used for switching, amplifying signals, and as variable resistors
Bio-polar junction transistor (edc)
A bipolar junction transistor (BJT) consists of two PN junctions formed by sandwiching either a p-type or n-type semiconductor between two opposite types. It has three sections - the emitter, base, and collector. Current flows due to both electrons and holes, making it a bipolar device. The base is lightly doped and very thin to allow charge carriers to easily move from the emitter to the collector. BJTs can be used as amplifiers because the collector current is controlled by the base current.
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A bipolar junction transistor (BJT) consists of two PN junctions formed by sandwiching either a p-type or n-type semiconductor between two opposite types. It has three sections - the emitter, base, and collector. Current flows due to both electrons and holes, making it a bipolar device. The base is lightly doped and very thin to allow charge carriers to easily move from the emitter to the collector. BJTs can be used as amplifiers because the collector current is controlled by the base current.
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This document discusses different types of transistors, including Bipolar Junction Transistors (BJT), Field Effect Transistors (FET), and specialized transistors. BJTs use both electron and hole charge carriers and have three terminals - emitter, base, and collector. FETs use only one type of charge carrier and have three terminals - drain, gate, and source. Common FET types include JFETs, which have a PN junction gate, and MOSFETs, which have an insulated gate. The document provides details on NPN and PNP BJTs, N-channel and P-channel JFETs, depletion and enhancement MOSFETs, and other specialized transistor types.
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This lecture discusses transistors, including what they are, their history, types, and uses. The key points are:
- A transistor is a 3-terminal semiconductor device that can amplify or switch electronic signals and electrical power. It comes in bipolar junction transistor (BJT) and field-effect transistor (FET) types.
- Transistors were invented in 1947 at Bell Labs and helped replace fragile vacuum tubes, finding widespread use in electronics.
- BJTs use both holes and electrons to carry current and have three terminals - base, collector, and emitter. FETs use an electric field to control the flow of electrons and have gate, source, and drain terminals.
Unit 5-BEE Electronics for Engineering in Computer branch 2nd sem diploma by ...
This document provides an overview of transistors and their applications. It discusses the basic construction and operation of bipolar junction transistors (BJT) including NPN and PNP types. It also covers transistor configurations like common base, common emitter, and common collector. The characteristics of transistors in the common emitter configuration are described. Finally, the document introduces junction field effect transistors (JFET) including the construction and operation of an n-channel JFET and its characteristics. Transistors are used as switches and amplifiers in various electronic applications.
Jfet knr
This document discusses field-effect transistors (FETs), specifically the junction field-effect transistor (JFET) and metal-oxide-semiconductor field-effect transistor (MOSFET). It describes the construction and operation of the n-channel JFET, including how applying a voltage to the gate controls the width of the depletion region and thus the current flowing between the source and drain terminals. The document also compares key differences between FETs and bipolar junction transistors (BJTs), such as FETs being unipolar devices with higher input impedance and thermal stability.
Transistor%20by%20Nouman%20-042%20khokhar.pptx
Transistors are semiconductor devices that can amplify or switch electronic signals and power. They operate as either switches or amplifiers and are made of doped silicon. There are two main types - bipolar junction transistors (BJT) and field-effect transistors (FET). BJTs use both electron and hole charge carriers and have three terminals - base, collector, and emitter. Current flowing into the base terminal controls the much larger currents in the collector and emitter. This amplification property allows BJTs to be used as amplifiers or electronic switches in many devices.
Transistor.ppt
Transistors are semiconductor devices that can amplify or switch electronic signals and power. They operate by controlling the flow of electrons in a semiconductor material with no moving parts. The transistor was invented in 1947 at Bell Labs by Bardeen, Brattain, and Shockley, using a solid piece of germanium. There are two main types - bipolar junction transistors (BJT) and field-effect transistors (FET). BJTs use both holes and electrons to conduct current and have three terminals - base, collector, and emitter. FETs use an electric field to control the shape and hence the conductivity of a channel of one type of charge carrier. Transistors are essential components in virtually all modern electronic
Transistor.ppt
Transistors are semiconductor devices that can amplify or switch electronic signals and power. They operate as either switches or amplifiers and are made of doped silicon. There are two main types - bipolar junction transistors (BJT) and field-effect transistors (FET). BJTs use both electron and hole charge carriers and have three terminals - base, collector, and emitter. Current flowing into the base terminal controls the much larger currents in the collector and emitter. This amplification property allows BJTs to be used as amplifiers or electronic switches in many devices.
Transistor.ppt
Transistors are semiconductor devices that can amplify or switch electronic signals and power. They operate as either switches or amplifiers and are made of doped silicon. There are two main types - bipolar junction transistors (BJT) and field-effect transistors (FET). BJTs use both electron and hole charge carriers and have three terminals - base, collector, and emitter. Current flowing into the base terminal controls the much larger currents in the collector and emitter. This amplification property allows BJTs to be used as amplifiers or electronic switches in many devices.
Transistor history, working and principles
Transistors are semiconductor devices that can amplify or switch electronic signals and power. They operate as either switches or amplifiers and are made of doped silicon. There are two main types - bipolar junction transistors (BJT) and field-effect transistors (FET). BJTs use both electron and hole charge carriers and have three terminals - base, collector, and emitter. Current flowing into the base terminal controls the much larger currents in the collector and emitter. This amplification property allows BJTs to be used as amplifiers or electronic switches in many devices.
تصميم بدون عنوان (1) [Autosaved] POWER AMPLIFER.pptx
MOS transistors are electronic devices used to switch or amplify voltages in circuits. They have three terminals - the source, gate, and drain - and come in two modes: depletion mode, which is normally closed, and enhancement mode, which is normally open. Amplifiers are also classified into classes like Class A, which amplifies the entire input signal linearly.
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Unit 5-BEE Electronics for Engineering in Computer branch 2nd sem diploma by ...
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BJT vs FET | Saif khan babar
- 1. BJT VS FET • DIFFERENCES & SIMILARITIES • THEIR FLOW OF ELECTRONS & HOLES By Saif Ur Rehman
- 2. BJT (BIPOLAR JUNCTION TRANSISTOR ) What is BJT? • The BJT is a one type of transistor that uses both majority and minority charge carriers. • There are three types of BJTs: NPN PNP
- 3. BJT • 3 Adjacent regions of doped Si (each connected to a lead) • Base. (thin layer,less doped). • Collector. • Emitter. NPN BIPOLAR JUNCTION TRANSISTOR PNP BIPOLAR JUNCTION TRANSISTOR
- 4. FEET (FIELD EFFECT TRANSISTOR) What is FET? • The term FET stands for Field effect transistor and it is also named as a Uni polar transistor. FET is a one type of transistor, where the o/p current is controlled by electric fields. • THE TWO MAIN TYPES OF FETs ARE: • JFET (Junction Field Effect Transistor) • MOSFET (Metal Oxide Semiconductor Field Effect Transistor)
- 5. FET • MESFET • HEMT • MODFET • Most common are the n-type MOSFET or JFET • FET consist of three terminals namely source, drain and gate terminals.
- 6. BJT VS FET S I M I L A R I T I E S • Amplifiers • Switching devices • Impedance matching circuits
- 7. D I F F E R E N C E S • How it operates • Voltage Difference • Input impedance • Impedance • Gain (Transconductance) • Current Difference • Size • Cost • Current Conduction • Popularity
- 8. D I F F E R E N C E S Medium Noise Generation Low Noise generation Medium switching time Fast switching time Robust Easily damaged Requires zero input to turn it "OFF" Some need an input to turn it "OFF" It is a Current controlled device. It is a Voltage controlled device. Cheap More expensive than BJT. Easy to bias Difficult to bias
- 9. FLOW OF ELECTRONS & HOLES IN BJT:
- 10. FLOW OF ELECTRONS & HOLES IN FET:
- 11. ‘ QUESTION ?