here creates a symbol, although not necessarily the best symbol. The steps used to create the part symbol above were: 1. In the part editor window, go to Option, Part Properties, Pin Names Visible (in box), and then False. The pin names inside the box disappear—a good thing, because they were18 Haz 2023 ... What do multiple emitters/collectors imply in a BJT schematics symbol?, Schottky diode like BJT symbol, Power Electronics.The BJT is a three terminal device and it comes in two different types. The npn BJT and the pnp BJT. The BJT symbols and their corresponding block diagrams are shown on Figure 1. The BJT is fabricated with three separately doped regions. The npn device has one p region between two n regions and the pnp device has one n region between two p regions.Figure 2 shows the schematic symbols for the npn and pnp bipolar junction transistors. Figure 2: Standard BJT symbols. Basic BJT Operation. Biasing. Figure 3 ...The current gain Ai of common collector BJT is given by the ratio of output current IE to input Current IB: IE = IC + IB. Ai = IE / IB. Ai = (IC + IB) / IB. Ai = (IC / IB) + 1. Ai = β + 1. Related Formulas and Equations Posts: Diode Formulas & Equations – Zenner, Schockley & Rectifier. Resistance, Capacitance & Inductance in Series-Parallel ... DC Circuit Theory. Calculator. Electrical Electronics. Mini projects. Resistors Transistors IO Devices DC Circuits Number System. Electronics. IO Devices. …Mar 15, 2020 · What is a NPN Transistor. An NPN transistor is the most commonly used bipolar junction transistor, and is constructed by sandwiching a P-type semiconductor between two N-type semiconductors. An NPN transistor has three terminals– a collector, emitter and base. The NPN transistor behaves like two PN junctions diodes connected back to back. Mar 1, 2021 · At best a common symbol is used for technology (BJT vs FET) but even that is a simplification that has marginal utility. It is important to understand, ahead of time, what your work product is trying to communicate, an electrical design consists of many different documents and deliverables. the circuit symbol always showing the direction of "conventional current flow" between the base terminal and its emitter terminal. The direction of the arrow always points from the positive P-type region to the negative N-type region for both transistor types, exactly the same as for the standard diode symbol. Bipolar Transistor ConfigurationsThe Bipolar Junction Transistor (BJT) is a device made of three layers of semiconductor material; these layers can be either P-type ... You can see the construction and symbols of PNP and NPN transistors below. How the Bipolar Junction Transistor Works. The BJT has two operation modes. It can be used as: an amplifier, which means that it can ...The term bipolar refers to the use of both holes and electrons as current carriers in the transistor structure. Figure 1: Basic BJT structure. The pn junction joining the base region and the emitter region is called the base-emitter junction. The pn junction joining the base region and the collector region is called the base-collector junction. Figure 4.3 Forward-reverse bias of a BJT. [5] Transistor Currents The directions and schematic symbol of the currents in an npn transistor and those for a pnp transistor are shown in figure 4.4. Notice that the arrow on the emitter of the transistor symbols points is the direction of convention current.Symbols of a BJT Structure of a BJT. A BJT has two P-N junctions connected back to back and sharing a common region B (base). This ensures contacts are made in all the regions that are base, collector and emitter. The structure of a PNP bipolar transistor is shown below. MOSFET types and circuit symbols. Some MOSFETs will have a diode inside, which is a body diode, or a ... (BJT) and a MOSFET. With the advantages of the high input impedance of MOSFET and low on-resistance of BJT, IGBTs are ideal for variable current systems with DC voltage of 600V and above, such as AC motors, inverters, …• The bipolar junction transistor is a semiconductor device constructed with three doped regions. • These regions essentially form two ‘back-to-back’ p-n junctions in the same block of semiconductor material (silicon). • The most common use of the BJT is in linear amplifier circuits (linear means that the output is proportional to input). Conclusion: A BJT is NOT the same as two diodes connected back-to-back (although it does have two p-n junctions). M. B. Patil, IIT Bombay. Bipolar Junction Transistors Using a more accurate equivalent circuit for the BJT, we obtain, 1 k 1 k 1 k 1 k B p n p B 5 V E C 10 V 5 V E C 10 V I3 I1 I2 I3 I1 I2 I1 RWe now get,Concept: Bipolar Junction Transistor (BJT). Report Error Is there an error in this question or solution? Q 7 Q 6Q 1. Chapter 16: Semiconductors Devices ...Question: 1. (3 points) Mark the emitter, collector, base, and the current flows for the forward active region on the following BJT symbol. What type of BJT is shown? 2. (3 points) If αF=0.975,V=0.615 V,IE=−275μA, and IB=125μA then find the values of IS,βF, and βR for the transistor in the figure shown below. i need explanation for these ... Bipolar junction transistor: (a) discrete device cross-section, (b) schematic symbol, (c) integrated circuit cross-section. Note that the BJT in Figure above(a) has heavy doping in the emitter as indicated by the N+ notation. The base has a normal P-dopant level. The base is much thinner than the not-to-scale cross-section shows.Figure 1: Structures, layers and circuit symbol of NPN transistor They have three regions and three terminals, emitter, base, and collector represented by E, B, and C respectively. ... BJT -Common Emitter Circuit The DC behavior of the BJT can be described by the Ebers-Moll Model. The equations for the model are:Bipolar junction transistor: (a) discrete device cross-section, (b) schematic symbol, (c) integrated circuit cross-section. Note that the BJT in Figure above(a) has heavy doping in the emitter as indicated by the N+ notation. The base has a normal P-dopant level. The base is much thinner than the not-to-scale cross-section shows.This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: An NPN BJT operating in the reverse-active region has : Select one: a. Vbe<0 and Vbc>0 b. Vbe <0 and Vbc<0 c. None of these d. Vbe>0 and Vbc<0 e. Vbe>0 and Vbc>0. There are 2 steps to solve this one.Bipolar junction transistor: (a) discrete device cross-section, (b) schematic symbol, (c) integrated circuit cross-section. Note that the BJT in Figure above(a) has heavy doping in the emitter as indicated by the N+ notation. The base has a normal P-dopant level. The base is much thinner than the not-to-scale cross-section shows.For the BJT symbol, emitter and collector are arranged in a line and the base is arranged vertically. There are two types of BJTs: NPN and PNP. MOSFET: MOSFET stands for Metal Oxide Field Effect Transistor, and it has three terminals named Source (S), Drain (D), and Gate (G). MOSFET has two types of symbols for n-channel or p-channel MOSFET.The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. It is a close cousin to the thyristor and like the thyristor consists of four p-n layers. It has an anode and a cathode connected to the first and the last layer respectively, and a gate ...BJT NPN symbol.svg. Symbol for an NPN BJT. Made specifically to be the same shape and style as Image:IGFET N-Ch Dep Labelled.svg, for using them together. Date. 22 September 2007. Source. The SVG code is valid. This symbol was created with Inkscape by user Omegatron. Author.Examples of a voltage-controlled voltage source, current-controlled voltage source, voltage-controlled current source and a current-controlled current source are shown in Figure 7.4.1 , left-to-right. On each of these symbols, the control element is shown to the left of the source. This portion is not always drawn on a schematic.Bipolar junction transistor: (a) discrete device cross-section, (b) schematic symbol, (c) integrated circuit cross-section. Note that the BJT in Figure above(a) has heavy doping in the emitter as indicated by the N + notation. The base has a normal P-dopant level. The base is much thinner than the not-to-scale cross-section shows.The terminals of BJTs are called Base (b), Collector (c), and Emitter (e). B = Base C = Collector E = Emitter. BJT Symbols. BJT Transistor Symbols. The ..."BJT" and "Junction transistor" redirect here. For other uses, see BJT ... Electronic symbol · IEEE 315-1975 (1993) 8.6.1 ...Week 6: Basic operation of Bipolar Junction Transistor Introduction to bipolar junction transistors, I-V characteristic and non-ideal effects. Week 7: Real Bipolar Junction Transistor structures, switching characteristics and model Switching characteristics of the Bipolar Junction Transistor, it circuit model and design strategy. Week 8: Final Exam26 May 2017 ... Position of the terminals and symbol of BJT; Transistor currents; Transistor Operation; Common-Base Configuration; Biasing; Transistor as an ...14 Kas 2019 ... I need to add a BJT to my own circuit. As there is no any BJT schematics in 65nm, I have to draw a layout to create a symbol and use that ...The BJT BJT Device Equations Figure 1 shows the circuit symbols for the npn and pnp BJTs. In the active mode, the collector-base junction is reverse biased and the base-emitter junction is forward biased. Because of recombina-tions of the minority and majority carriers, the equations for the currents can be divided into three regions: low, mid ...May 14, 2013 · \$\begingroup\$ This is what I suspected - I don't mind a plethora of MOSFET symbols that are all takes on a similar theme but the Circuit_Lab symbol just seems to be in it's own league - it might be trying to mimic a BJT - the emitter and source (for NPN and N channel) do point the same way (now that I have become semi-accustomed to the symbol). Question: 1. (3 points) Mark the emitter, collector, base, and the current flows for the forward active region on the following BJT symbol. What type of BJT is shown? 2. (3 points) If αF=0.975,V=0.615 V,IE=−275μA, and IB=125μA then find the values of IS,βF, and βR for the transistor in the figure shown below. i need explanation for these ...BJT: the arrow represents the base-emitter junction, which acts as a common diode (remember the 0.7 V drop). So the arrow is like the arrow in the diode symbol. MOSFET: This dates back from the JFET days: in that case there's a gate-channel P-N junction, and the arrow points from the P to N doped silicon. The three short lines indicate that it ...A phototransistor is a component that turns light into electricity. It is a type of transistor, just that it uses light instead of a base current to turn on and off. Its symbol looks like this: In a normal (BJT) transistor, the current from the base to the emitter controls the flow of current between the collector and emitter. In a ...Aug 8, 2022 · You can see that it is like a BJT symbol with a special bar that indicated the gate structure of the MOSFET, rather than the base as we discussed above, the combination of a MOSFET and a BJT. IGBT input characteristics are like MOSFET and output like BJT. Electrical Engineering Electrical Engineering questions and answers #3 - BJT Circuits Under DC Conditions (10 points)The BJT in the circuit to the left has β=100. The BJT is operating in the active mode, and it is needed to obtain an emitter current IE=2.25mA and a collector voltage VC= 3.2V.Find the value of RC,RE,IB,VE.What is BJT – Bipolar Junction Transistor? Bipolar junction transistor (BJT) is a bidirectional device that uses both electrons and holes as charge carriers. While Unipolar transistor i.e. field effect transistor uses only one type of charge carrier. BJT is a current controlled device. The current flows from emitter to collector or from ... tions are critical to the operation of the BJT. BJTs are also simply known as bipolar transistors. 8.1 INTRODUCTION TO THE BJT A BJT is made of a heavily doped emitter (see Fig. 8–1a), a P-type base, and an N-type collector. This device is an NPN BJT. (A PNP BJT would have a P+ emitter, N-type base, and P-type collector.) pnp BJT Symbol. • In the symbol for a pnp BJT transistor the direction of the arrow on the emitter is reversed. E. B. C. Page 23. BJT Circuits. • Most ...Discover NPN transistors, BJTs, and the development of transistors. Learn about the NPN Transistor Circuit, Transistor Symbol, and how an NPN...Jun 30, 2020 · Bipolar Junction Transistor - A Bipolar Junction Transistor (BJT) is a three terminal circuit or device that amplifies flow of current. It is solid state device that flows current in two terminals, i.e., collector and emitter and controlled by third device known as terminal or base terminal. Unlike a normal p-n junction diode, t. tions are critical to the operation of the BJT. BJTs are also simply known as bipolar transistors. 8.1 INTRODUCTION TO THE BJT A BJT is made of a heavily doped emitter (see Fig. 8–1a), a P-type base, and an N-type collector. This device is an NPN BJT. (A PNP BJT would have a P+ emitter, N-type base, and P-type collector.) In many cultures, the elephant is a symbol of power and strength. However, the elephant symbolizes many different things to many cultures and even has several significant religious meanings."BJT" and "Junction transistor" redirect here. For other uses, see BJT ... Electronic symbol · IEEE 315-1975 (1993) 8.6.1 ...The zener symbol is wrong. BJT’s are NOT current controlled ! that is a huge misconception. The base-emitter current is a side effect. Look up Gummel-Poon model. Net labels are just that . Labels. they …Current Gains in BJT: There are two types of current gain in BJT i.e. α and β. Where. I E is the emitter current; I C is the collector current; I B is the base current; Common Base Configuration: Common Base Voltage Gain. In common base configuration, BJT is used as voltage gain amplifier, where the gain A V is the ratio of output voltage ...A bipolar junction transistor bjt is a transistor whose operation depends on the contact made by two semicondutors. Web the bjt symbols and their corresponding block diagrams are shown on figure 1. A Bipolar Junction Transistor (Bjt) Is A Type Of Transistor That Uses Both Electrons And Electron. The pn junction joining the base.V1 R1 L1 C1 R2 Figure 3: A circuit Given resistor R₁ = 2k2, L₁= 2.5H, and AC voltage source V₁ = 6cos (2t) V. Provide values for the complex load of R2 and C₁ which will …BJT Symbols BJT Transistor Symbols. The collector and emitter form the main conductive path, and the base controls that path. To explain how a BJT works, I am going to start with an NPN. A PNP is the same, but with the directions of current at each terminal reversed.Download scientific diagram | (a) Symbol of a BJT as a three-terminal device and (b) corresponding two-port element definition. from publication: Explicit ...A phototransistor is a component that turns light into electricity. It is a type of transistor, just that it uses light instead of a base current to turn on and off. Its symbol looks like this: In a normal (BJT) transistor, the current from the base to the emitter controls the flow of current between the collector and emitter. In a ...Bipolar junction transistor: (a) discrete device cross-section, (b) schematic symbol, (c) integrated circuit cross-section. Note that the BJT in Figure above(a) has heavy doping in the emitter as indicated by the N+ notation. The base has a normal P-dopant level. The base is much thinner than the not-to-scale cross-section shows.BJTs PNP and NPN schematic symbols. 3D model of a TO-92 package, commonly used for small bipolar transistors. A bipolar junction transistor ( BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. Nov 4, 2020 · Description: PNP transistor symbol with case (IEEE 315). Note: A little confusing on the BJT page, because the NPN is drawn with Collector (C) on the top, while here it is drawn on the bottom. For the BJT symbol, emitter and collector are arranged in a line and the base is arranged vertically. There are two types of BJTs: NPN and PNP. MOSFET: MOSFET stands for Metal Oxide Field Effect Transistor, and it has three terminals named Source (S), Drain (D), and Gate (G). MOSFET has two types of symbols for n-channel or p-channel MOSFET.The typical symbol of IGBT along with its image is shown below. As mentioned earlier an IGBT is a fusion between a BJT and MOSFET. The symbol of the IGBT also represents the same, as you can see the input side represents a MOSFET with a Gate terminal and the output side represents a BJT with Collector and Emitter. The ...BJT Symbols BJT Transistor Symbols. The collector and emitter form the main conductive path, and the base controls that path. To explain how a BJT works, I am going to start with an NPN. A PNP is the same, but with the directions of current at each terminal reversed.May 22, 2022 · 1. Figure 4.2.1 4.2. 1: Basic configuration of NPN bipolar junction transistor. This diagram is drawn to ease the understanding of the operation of the device, extending our earlier diode work. In contrast, real BJTs are built in more of a “layer cake” fashion, N-P-N bottom to top 1. Transistors, Bipolar. There are not too many circuit symbols for bipolar transistors. There are of course different circuit symbols to indicate NPN and PNP transistors. In addition to this, some transistor circuit symbols have the circle around them and others not. Those without are widely used in the circuits detailing the internal circuitry ... For the BJT, on an n-p-n transistor symbol, the arrow will "Not Point iN". On a p-n-p transistor symbol, the arrow "Points iN Proudly". This however does not apply to MOSFET-based transistor symbols as the arrow is …The term bipolar refers to the use of both holes and electrons as current carriers in the transistor structure. Figure 1: Basic BJT structure. The pn junction joining the base region and the emitter region is called the base-emitter junction. The pn junction joining the base region and the collector region is called the base-collector junction. The detailed behavior of the BJT will be summarized by a circuit model. Syllabus. Week 1: ... My last suggestion is that there should be more explanations for the …A transistor is defined as a semiconductor device that’s fundamentally built with three terminals for amplifying or switching electronic signals and electrical power purposes. Commonly classified into Bipolar Junction Transistors (BJT), and Field Effect Transistors (FET), these devices allow for the existence of radios, computers, calculators ...- The symbols for the npn and pnp transistors are<br /> shown in Figure 2.<br /> Bipolar Junction Transistors<br /> ... Figure 1 BJT Structure Figure 2 npn and pnp BJT symbols Figure 3 Forward - reverse of a BJT Prepared By: Syed Muhammad Asad – Semester 102 Page 1. Page 2 and 3: PHYS 162 - Chapter 4 4-3 BJT CHARAC;Draw symbol and label the terminal of: 1. Photo diode 2. UJT Define Intrinsic and Extrinsic semiconductor. Intrinsic- The pure ... List types of BJT and draw symbols of the same …Download: Sample datasheet of a bipolar junction transistor. Review. Bipolar junction transistors or BJT is a semiconductor device that is structured like two p-n junction diodes connected back to back. The three leads of a BJT are Collector, base, and emitter. Two types of BJT are NPN and PNP. A Bipolar Junction transistor is a current ... the LM317 device symbol is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A . the output voltage range of this IC is 1.25 V to 37 V design vector vector illustration of an electronic component symbol icon, with its name. Figure 2 shows the schematic symbols for the npn and pnp bipolar junction transistors. Figure 2: Standard BJT symbols. Basic BJT Operation. Biasing. Figure 3 ...The circuit in the above figure shows the PNP transistor as a switch. The operation of this circuit is very simple, if the input pin of transistor (base) is connected to ground (i.e. negative voltage) then the PNP transistor is in ‘ON’, now the supply voltage at emitter conducts and the output pin pulled up to the larger voltage.The term bipolar refers to the use of both holes and electrons as current carriers in the transistor structure. Figure 1: Basic BJT structure. The pn junction joining the base region and the emitter region is called the base-emitter junction. The pn junction joining the base region and the collector region is called the base-collector junction. Transistors, Bipolar. There are not too many circuit symbols for bipolar transistors. There are of course different circuit symbols to indicate NPN and PNP transistors. In addition to this, some transistor circuit symbols have the circle around them and others not. Those without are widely used in the circuits detailing the internal circuitry ...the LM317 device symbol is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A . the output voltage range of this IC is 1.25 V to 37 V design vector vector illustration of an electronic component symbol icon, with its name. May 22, 2022 · 1. Figure 4.2.1 4.2. 1: Basic configuration of NPN bipolar junction transistor. This diagram is drawn to ease the understanding of the operation of the device, extending our earlier diode work. In contrast, real BJTs are built in more of a “layer cake” fashion, N-P-N bottom to top 1. The arrow on the BJT symbol is important because it designates the a) base b) collector c) emitter d) ground 3. The ratio of emitter current to collector ...Symbol of BJT. Bipolar junction Transistor shortly known as BJT has the following three components; Base. Emitter. Collector. All of the three components are represented in the symbol given below as B, E, and E. Refer to the diagram given below showing the symbol of NPN and PNP Bipolar Junction Transistors;4 Department of EECS University of California, Berkeley EECS 105 Spring 2004, Lecture 22 Prof. J. S. Smith BJT operating modes zForward active – Emitter-Base forward biased – Base-Collector reverse biased zSaturation – Both junctions are forward biased zReverse active – Emitter-Base reverse biased – Base-Collector forward biased – Transistor …A PNP transistor is a bipolar junction transistor constructed by sandwiching an N-type semiconductor between two P-type semiconductors. A PNP transistor has three terminals – a Collector (C), Emitter (E) and Base (B). The PNP transistor behaves like two PN junctions diodes connected back to back. These back to back PN junction diodes are ...Bipolar Junction Transistor (BJT) – Formulas and Equations; Transistor, MOSFET and IGFET Symbols; MOSFET. MOSFET or Metal Oxide Semiconductor Field Effect Transistor is a type of FET whose gate terminal is electrically isolated from its channel. Therefore, it is also known as IGFET (Insulated Gate Field Effect Transistor).A Bipolar junction transistor, commonly known as BJT, is a Si or Ge semiconductor device that is structured like two p-n junction diodes connected back to back. It has two outer regions which are the emitter and collector and another region in the middle known as the base. ... Symbol and terminals in bipolar junction transistor. Emitter: A ...Symbol“ in the file menu. Then open the symbol for a diode („diode.asy“ in folder „lib / sym). Then draw the gate pin for a thyristor. Warning: The SPICE model uses the …Transistors, Bipolar. There are not too many circuit symbols for bipolar transistors. There are of course different circuit symbols to indicate NPN and PNP transistors. In addition to this, some transistor circuit symbols have the circle around them and others not. Those without are widely used in the circuits detailing the internal circuitry ... For the BJT symbol, emitter and collector are arranged in a line and the base is arranged vertically. There are two types of BJTs: NPN and PNP. MOSFET: MOSFET stands for Metal Oxide Field Effect Transistor, and it has three terminals named Source (S), Drain (D), and Gate (G). MOSFET has two types of symbols for n-channel or p-channel MOSFET.
Question: 1. (3 points) Mark the emitter, collector, base, and the current flows for the forward active region on the following BJT symbol. What type of BJT is shown? 2. (3 points) If αF=0.975,V=0.615 V,IE=−275μA, and IB=125μA then find the values of IS,βF, and βR for the transistor in the figure shown below. i need explanation for these .... Who is james holt
The programmable unijunction transistor, or PUT, is a multi-junction device that, with two external resistors, displays similar characteristics to the UJT. It is a close cousin to the thyristor and like the thyristor consists of four p-n layers. It has an anode and a cathode connected to the first and the last layer respectively, and a gate ...There are four transistor types that correspond to these basic active device models. The schematic symbols for these are shown in figure 8.2.1. The n-type current controlled device is the NPN Bipolar Junction Transistor (BJT). The p-type current controlled device is the PNP BJT. 4 Department of EECS University of California, Berkeley EECS 105 Spring 2004, Lecture 22 Prof. J. S. Smith BJT operating modes zForward active – Emitter-Base forward biased – Base-Collector reverse biased zSaturation – Both junctions are forward biased zReverse active – Emitter-Base reverse biased – Base-Collector forward biased – Transistor …Toshiba Bipolartransistor (BJT) - Produktdetailinformationen 2SA2060 (TE12L,F) C1S751200683460 Toshiba Bipolartransistor (BJT) Design and Simulation Data Andere …npn BJT Symbol npn BJT Symbol. C B. E pnp BJT Symbol • In the symbol for a pnp BJT transistor the direction of the arrow on the emitter is reversed. C B E BJT ...The metal-oxide-semiconductor field-effect transistor ( MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon. It has an insulated gate, the voltage of which determines the conductivity of the device.Bipolar Transistor Construction The construction and circuit symbols for both the PNP and NPN bipolar transistor are given above with the arrow in the circuit symbol always showing the direction of “conventional current flow” between the base terminal and its emitter terminal. The conduction level in a bipolar junction transistor (BJT) depends on two charge carriers – electrons and holes. The JFET, however, is a unipolar device because its conduction depends uniquely on one type of carrier – electrons (n-channel) or holes (p-channel). Other essential characteristics of the JFET are: Ease of manufacture.BJT, BJT circuit symbols, BJT circuits, circuit symbol conventions, NPN, PNP, voltage polarity. The following is an explanation of symbol conventions , voltage polarities and current directions for npn and pnp BJTs. The goal is to help understand these characteristics but not on the physical level of electrons and holes.V1 R1 L1 C1 R2 Figure 3: A circuit Given resistor R₁ = 2k2, L₁= 2.5H, and AC voltage source V₁ = 6cos (2t) V. Provide values for the complex load of R2 and C₁ which will …This is a demonstration of an NPN transistor. The emitter is at ground, and the base and collector voltages can be controlled using the sliders at right. Move the mouse over the transistor to see labels for the three terminals. The base-emitter junction acts like a diode . Little current flows into the base unless it is above about 0.6V.The current gain Ai of common collector BJT is given by the ratio of output current IE to input Current IB: IE = IC + IB. Ai = IE / IB. Ai = (IC + IB) / IB. Ai = (IC / IB) + 1. Ai = β + 1. Related Formulas and Equations Posts: Diode Formulas & Equations – Zenner, Schockley & Rectifier. Resistance, Capacitance & Inductance in Series-Parallel ...• The bipolar junction transistor is a semiconductor device constructed with three doped regions. • These regions essentially form two ‘back-to-back’ p-n junctions in the same block of semiconductor material (silicon). • The most common use of the BJT is in linear amplifier circuits (linear means that the output is proportional to input). .