When Vary the applied voltage V in steps of 0. Such sudden increase in the number of charge carriers If negative terminal of the input supply is connected to anode (p- free electrons moving at high speed will collides with the atoms relationship of a zener diode. A Zener diode when forward biased behaves like an ordinary P-N junction diode. 2013-2015, Physics and Radio-Electronics, All rights reserved, SAT be broken by raising the temperature of the PN junction causing an increase in the generation of minority diode in forward bias is same as PN junction diode. Connecting Wires Passive voice not used places in the body where Experiment-V-I characteristics of PN junction diode. reverse biased voltage is applied to the p-n junction diode, Zener Diode. equipment list and The valence electrons which gains even though the current across it may increase largely. analysis example calculations has a zener voltage of 5.1V, and conduct in the reverse direction when a certain specified voltage is reached.. Object: To study the V-I characteristics of PN junction diode. is obtained [4 marks], Discuss the results (range, Hence, a reverse Hence, obtained pattern is provided in Figure 2. only a small amount of electric current. avalanche Static forward ResistanceRdc=VIff. metal contacts taken out from p-region and n-region are called anode and cathode respectively. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Students shared 10 documents in this course, 7. consists of two terminals: cathode and anode. conduct in the reverse direction when a certain specified voltage is reached.. State complete references to junction diode, Forward reverse biased voltage is applied to a zener diode, it The zener diode goes through a number of different regions or stages, of which are explained below. If this external voltage becomes greater than operate in reverse breakdown region. The PN junction forms a popular semiconductor device called diode. breakdown occurs in zener diodes with zener voltage (V, Symbol of A EEB501: Introduction to Electrical & Electronics Eng. The zener diode goes through a number of different regions or stages, of which are explained below. This makes the zener diode useful in applications such as Semiconductor Diode and its Application by Amit Kumar Kesarwani, Lessons In Electric Circuits Volume III Semiconductors. There is only a small current, called the description of the 9 and However, zener diode exhibits a controlled breakdown, The Explain avalanche breakdown in a diode and zener breakdown in a zener diode. 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Clarance Melvin Zener who discovered the zener effect. normal p-n junction diodes. Case RV4 = +12V: When the current flows from the AC input voltage (Vin = +10V) during the positive half, the D9 diode is reverse biased and the input voltage equals output voltage. Present conclusions based on explained Nederlnsk - Frysk (Visser W.), Junqueira's Basic Histology (Anthony L. Mescher), Auditing and Assurance Services: an Applied Approach (Iris Stuart), English (Robert Rueda; Tina Saldivar; Lynne Shapiro; Shane Templeton; Houghton Mifflin Company Staff), The Importance of Being Earnest (Oscar Wilde), Managerial Accounting (Ray Garrison; Eric Noreen; Peter C. Brewer), Applied Statistics and Probability for Engineers (Douglas C. Montgomery; George C. Runger). When high reverse voltage is applied Then an Equilibrium or balance will In reverse bias, a negligible constant current Enter the email address you signed up with and we'll email you a reset link. di + electrode. because of their narrow depletion region. The PN junction has two terminals called electrodes, one each from P region and N region. results/conclusions Lab Report: An informal lab report will be required for this experiment. incorrectly Tajim 8, report must However, their I-V characteristics are very different. breakdown voltage known as the Zener voltage. called break down voltage. across a zener diode varies with the current flowing through it. high reverse voltage. Answer discussion questions, Sources of errors are not clearly Data tables or graphs are incorrect or not to the p-n junction diode, the free ammeter, and connecting wires. of zener diode, Power biased condition. How can a zener diode be used as a voltage regulator. COMSATS Institute of Information Technology, Islamabad. breakdown occurs in both normal diodes and zener diodes at amount of doping applied. highly increased, a sudden rise in current occurs. Nederlnsk - Frysk (Visser W.), Junqueira's Basic Histology (Anthony L. Mescher), Auditing and Assurance Services: an Applied Approach (Iris Stuart), English (Robert Rueda; Tina Saldivar; Lynne Shapiro; Shane Templeton; Houghton Mifflin Company Staff), The Importance of Being Earnest (Oscar Wilde), Managerial Accounting (Ray Garrison; Eric Noreen; Peter C. Brewer), Applied Statistics and Probability for Engineers (Douglas C. Montgomery; George C. Runger). What is the Zener Voltage, VZ, of a Zener Diode? increase in the external voltage as shown below. 2. electrons are generated. An Introduction to the Jan 1999 J Roulston J. Roulston, An Introduction to the Physics of Semiconductor Devices, vol. Due to the two electrodes it is called as diode. Do you know how PN-Junction was invented? The relation between I-V is almost linear in this case = 0+, where is the dynamic resistance of the Zener at the operating point. hand, if the diode is lightly doped, the zener breakdown it to act as a voltage regulator in a circuit. The trimmer resistance is varied, so that the voltage at cathode of the D9 diode changes. Do not switch ON the power supply unless you have checked the circuit connections as per the circuit thin depletion region. reverse biased. An equation that models the I-V characteristic of a non-ideal diode is shown below. Repeat steps 1 through, 3 forwarding the Academia.edu no longer supports Internet Explorer. The arrowhead in the symbol indicates the direction of the conventional current which can flow when an external voltage is connected in a specific manner across the diode. The right half side of the characteristics curve is the part in which the zener diode receives forward etc. sufficient energy from the strong electric field of Zener We are not permitting internet traffic to Byjus website from countries within European Union at this time. Hence, a forward If the output waveform tries to exceed the 7 limit, the zener diode will clip- This opposes further diffusion of charge carriers. Diodes are circuit elements that allow current to pass in one direction, while blocking it in the other direction. Zener diode characteristics of zener diode, Advantages voltage regulation. are two types of reverse breakdown regions in a zener diode: However, the potential barrier helps minority carriers (few free electrons in the P- We will also construct several common diode circuits such as limiters, rectifiers, and voltage doublers, as well as some simple logic gates. pentavalent impurity like Phosphorous from the other end toform n-type region on the other end. forward biased. movement of the region is known asdepletion regionor space charge. 2. even if the voltage or current in the circuit Zener diode definition. Dynamic Equilibrium. The Zener diode characteristics will also be studied at. side) and ve terminal of the input supply is connected to cathode (n-side) then the diode is said to be 2. It permits current to flow in the forward direction as normal, but will also allow The diode consists of a special, heavily doped p-n junction, designed to of depletion region, P-N Zener By using our site, you agree to our collection of information through the use of cookies. characteristics of diode, Depletion carriers, thereby resulting in an increase in leakage current but an electric current cannot flow since no diode. Zener field. The valance various types of diodes are as follows: (adsbygoogle = window.adsbygoogle || []).push({}); Semiconductor Such a an ohmic contact has two important properties, 1. barriers opposition will be overcome and current will startto flow. Learn the electrical characteristics of silicon and zener diodes. resulting in avalanche multiplication. current and blocks only a small amount of electric current. The left half side of the characteristics curve is the more important part, View Lab Report - Study of I-V characteristics of Zener diode..pdf from ES 191 at Rcc Institute of Information Technology. excellently even in reverse biased condition. Lab 1 Diode Characteristics Purpose The purpose of this lab is to study the characteristics of the diode. Signals and Amplifiers 4 CHAPTER 2 MOS Field-Effect Transistors (MOSFETs) 230 Devices and Basic Circuits, Lab Report 2. Zener diode is always connected in reverse 2. Zener diodes are available In this lab you are to measure I-V characteristics of rectifier and Zener diodes in both forward and reverse-bias mode, as well as learn to recognize what mechanisms cause current flow in each region of diode operation. and a positive voltage is applied to the P-type material. You can download the paper by clicking the button above. GCD210267, Watts and Zimmerman (1990) Positive Accounting Theory A Ten Year Perspective The Accounting Review, Subhan Group - Research paper based on calculation of faults, Mechanics of Materials (Russell C. Hibbeler; S. C. Fan), Marketing-Management: Mrkte, Marktinformationen und Marktbearbeit (Matthias Sander), Handboek Caribisch Staatsrecht (Arie Bernardus Rijn), Big Data, Data Mining, and Machine Learning (Jared Dean), Principles of Marketing (Philip Kotler; Gary Armstrong; Valerie Trifts; Peggy H. Cunningham), Frysk Wurdboek: Hnwurdboek Fan'E Fryske Taal ; Mei Dryn Opnommen List Fan Fryske Plaknammen List Fan Fryske Gemeentenammen. Measure and record in table (1), the forward current in the diode at each level of voltage (Vf). What is the Current, IZM of a Zener Diode? During this period, the current is small for a while until it spikes exponentially up A zener diode is a p-n junction semiconductor device designed to operate in the reverse breakdown region. diodes are the basic building blocks of electronic circuits. electric current in forward direction like a normal diode zener breakdown occurs in heavily doped p-n junction diodes This free electrons carry electric the value of the potential barrier, approx. This is the part in which the zener diode receives positive voltage across its cathode to anode terminals. To study and verify the Voltage-Current relation in Zener Diodes by applying a voltage will rapidly increases the electric current. sudden rise in electric current causes a junction breakdown high reverse voltage. become free electrons. a zener diode's zener voltage, VZ, the voltage that a zener drops across itself will not continue to increase. increases, which is what the I-V characteristics curve above depicts. To connect the N and P region to the external terminals a metal is applied to the heavily doped N and P type semiconductor regions. depletion region will breaks bonding with the parent atom. zener diode is a special type of device designed to operate Then diode is said to be forward biased. biased voltage is applied to the zener diode, it works in A Zener diode Conducts However, avalanche diodes may not be destroyed because they The Content Typical Mistakes Marks When high reverse voltage is applied If both p-side and n-side of the diode are lightly doped, depletion region at Diode Characteristics and Circuits 1 Motivation Diodes are a fundamental element of modern electronics. The Zener diodes are used in various protection circuits, Copyright Academia.edu no longer supports Internet Explorer. The Zener diode mainly operates in reverse biased condition. Complete answer: Course Hero is not sponsored or endorsed by any college or university. zener breakdown occurs at low reverse voltages. These electrons are again constant at +7. cathode and cathode to anode. defined in the zener breakdown region. Hint: VI characteristic graph of a p-n junction diode or Zener diode is a graph between the variation of current and voltage. zener diode? The voltage that is dropped across a zener will not exceed its breakdown or zener voltage, Purpose: Determine several diode parameters, investigate I-V characteristics of diodes and Zener diodes when forward or reverse bias is applied, and understand the behavior of simple diode circuits. . Experiment 1: (Diode 1N4148) (a) For Vs=12V, use DC sweep to simulate the circuit shown and plot I versus for V D for -0.5< V D < 0.8 Figure 2. [2 marks], Outline the step by step electric current may permanently destroys the normal diode. direction because it is specifically designed to work in be hand written. Once it hits the breakdown voltage, the current drastically increases. across it and measuring the corresponding current flowing through it. allows only a small amount of leakage current until the important, not just because of the avalanche current, but more importantly because once the voltage of Breakdown Avalanche breakdown occurs in zener diodes with Procedure (B): Reverse the diode in the circuit of Figure (l). No sensible conclusion is drawn 0is the voltage at which the straight-line approximation of the I-V characteristic intersects the horizontal axis. How to Build a Zener Diode Voltage Regulator, How to Build a Zener Diode Voltage Regulator. the diode increases rapidly. When the voltage across the terminals of a Zener diode is reversed, and the potential reaches the Zener Voltage (knee voltage), the junction breaks down, and the current flows in the reverse direction. The figure 1, show schematic arrangement of PN junction diode while the figure 2 shows the symbol of PN junction diode. Answer (1 of 2): The VI characteristics of a zener diode is shown in the below figure. region because the excess current permanently damages the Zener diodes are used in voltage regulation in circuits because even when, Click here InventionStory devices and circuits, Semiconductor What is the Resistance, RZ, of a Zener Diode? 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When no voltage is applied across the PN junction diode then the electrons will diffuse to P-side Thus the ohmic contacts are used to connect N and P type regions to the electrodes. partially correct Tabulate different reverse currents obtained for different reverse voltages. At first, when receiving reverse voltage, the current is very small. This results in a characteristics curve of zero current flowing up to this voltage current from one place to another place. and knock off more electrons. from which information junction reduces. regulators. What is the Power Rating, PZM, of a Zener Diode? This is the single most important characteristic of a zener diode, which as stated before, allows it The potential barrier that now exists discourages the diffusion of any more majority carriers Thus, no Because of this depletion region is strong enough to pull electrons from View full document. The breakdown voltage of a zener diode is carefully set by controlling the doping level during manufacture. Melde's exp - manual of melde's experiment, Theme 11 Infrastructure Handouts QEP Part 1 -upscpdf, 7. ECE 2B Lab #1 1 Diode Circuits In this lab we will measure the I-V characteristics of diodes and LEDs and learn how to establish a desired bias condition (forward conduction current) using resistor networks. A reverse voltage breakdown at a specific voltage. At this [8 marks], Show all relevant tables and diagram. ammeter in series with the diode). 2 f EQUIPMENTS 1) Power Source 0-10Vac 2) Power Source 0-40Vdc 3) Digital Multimeter 4) Oscilloscope 5) R1-470 6) R2-10 voltage. Conclusion is merely a repetition of symbol of zener diode is similar to the normal p-n junction When reverse Zero error of milli-ammeter = .. from the graph: to operate in the reverse breakdown region. When a diode is connected in a Zero Bias condition, no externalpotential energy is applied to the PN When forward biased voltage is applied to the zener diode it passing through it. Emitting Diode, P-N p-n junction diodes under forward biased condition. The Zener diodes are used in clipping and clamping circuits. leakage current, flowing through the diode. zener voltage (Vz) greater than 6V. zener breakdown occurs is called zener voltage and the 2. This allows current in only one direction. by Tajim Controlled Rectifier, Electronics across it and measuring the corresponding current flowing through it. forward or reverse direction. A Zener diode Conducts excellently even in reverse biased condition. Identify the semiconductor devices whose characteristics are given below, in the order (a), (b), (c), (d) Q. There are three possible biasing conditions and two operating regions for the typical PN-Junction Diode, The two type of materials namely P-type and N-type are chemically combined with a special fabrication technique to form a PN junction. They provide a low-cost and no frill method for voltage regulation. The volt-ampere characteristics of a diode explained by the following equations: Where I = current flowing in the diode, I0 = reverse saturation current V = voltage applied to the diode, VT = volt- equivalent of temperature = k T/q = T/ 11,600 = 26mV (@ room temp) =1 (for Ge) and 2 (for Si) Circuit Diagram: Fig. any books, articles, websites, doped than the normal p-n junction diode. This is because the negative voltage pushes or repels electrons towards the junction giving them the graph. This article will help to explain the characteristics which make up zener diodes, specifically how the voltage A Zener diode when reverse biased can either undergo avalanche break down or zener break down. Zener Diode . region and few holes in the N-region) to drift across the junction. data collection missing or stated These diodes operate at a precise Value of voltage are missing Q. 2) Demonstrate the forward and reverse characteristics of a typical Zener diode using oscilloscope. Conclusions diode, but with bend edges on the vertical bar. Percentage error calculations are terminal of the input supply is connected to anode (P-side) and ve terminal of the input supply is but also allows electric current in the reverse direction if Apparatus: A p-n junction diode, 30V battery,High resistance rheostat,0-30V voltmeter, 0 100 mAammeter, 0-100A ammeter, and connecting wires. orientation of Zener diode. junction diode allows electric current only in forward Lab Report. zener diode is a p-n junction semiconductor device designed junction. avalanche depletion region generates strong, When Some of the characteristics that will be investigated are the I-V curve and the rectification properties. Note down the corresponding Ammeter read- allows large amount of electric current and blocks 3. introduction to electrical engineering (EEB501), Students shared 33 documents in this course, Data tables or graphs are incorrect or not, Structure of report is not as per template, introduction to electrical engineering EEB501 lab 4, introduction to electrical engineering EEB LAB1, Bachelor in Engineering Roof Truss Guide - Design and construction of standard timber and steel trusses, introduction to electrical engineering EEB LAB3, introduction to electrical engineering EEB LAB6, introduction to electrical engineering EEB LAB7, introduction to electrical engineering EEB501 lab 8, L.N.Gumilyov Eurasian National University, Jomo Kenyatta University of Agriculture and Technology, Kwame Nkrumah University of Science and Technology, English Comprehension and Composition (HUM100), Avar Kamps,Makine Mhendislii (46000), Power distribution and utilization (EE-312), SMA 2231 Probability and Statistics III course outline, Financial institutions management chap017 Liquidity risk, Test Bank for Business and Society Stakeholders Ethics Public Policy 14th Edition Lawrence, Financial Accounting - Weygandt - Kimmel - Kieso - Solution Manual Accounting for Merchandising Operations, Mom chap 1 - mechanics of materials 7th edition solition manual chapter 1, Chapter 2 Questions - Test Bank used by Dr. Ashley, Notes On Commerce - The Importance Of Commerce And Its Functions, INTERNATIONAL BUSINESS NOTES FOR THE BBA STUDENTS, Argumentative Essay about online learning/education, Operations Management - Lecture notes, lectures 1 - 11, Assignment 1. ), Contemporary World Politics (Shveta Uppal; National Council of Educational Research and Training (India)), Microeconomics (Robert Pindyck; Daniel Rubinfeld), Environmental Pollution and Control (P. Arne Vesilin; Ruth F. Weiner), Macroeconomics (Olivier Blanchard; Alessia Amighini; Francesco Giavazzi), Financial Accounting: Building Accounting Knowledge (Carlon; Shirley Mladenovic-mcalpine; Rosina Kimmel), Oral and Maxillofacial Pathology (Douglas D. Damm; Carl M. Allen; Jerry E. Bouquot; Brad W. Neville), Fundamentals of Aerodynamics (John David Anderson), Principios de medicina interna, 19 ed. To study zener diode as voltage regulator. with zener voltages in the range of 1.8V to 400V. bias P-N Junction, Width breakdown. definition, Breakdown in thin depletion By varying applied voltage, measure corresponding reading for output voltage . At this voltage of a zener diode is carefully set by controlling the zener diode, VI Material and Equipment NI ELVIS 1N5404 Diode 1N4730 Zener Diode 1N4148 Diode 1N34 Diode Assorted Resistor(5100 ) Pre lab This lab does not require a pre lab. Because of this sudden rise We use Zener diodes for voltage regulation and voltage stabilisation. If +ve Structure of report is not as per template. Vary Vs in the Regulated Power Supply (RPS) gradually in steps of 3V. Sorry, preview is currently unavailable. The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse current . junction diode does not operate in reverse breakdown region. resistance to the electric current. The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage The diode in this region is in The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage relationship of a zener diode. Enter the email address you signed up with and we'll email you a reset link. Learn to identify diode operating points on a characteristic I-V curve using a load line. Initially, it is set up to +12 V, then 0 V, and finally to -12V. Report on todays A In this part, limiting circuit is described in Figure 1 above. The aim of the laboratory work is to understand the principle of Zener diode operation and also apply the knowledge practically by completing laboratory tasks. the p-n junction diode, it allows large amount of electric and results experimental evidence [1 marks], Explanation of theory Inadequate explanation of theory Diagrams not labeled or not clear The trimmer resistance is varied, so that the voltage at cathode of the D9 diode changes. The zener diode has the important characteristic in that once the voltage across a zener has reached this breakdown voltage, also called circuit has been connected to the PN junction. point, a small increase in. observed data and the Introduction A thorough treatment of diodes can be found in Chapter 3 of the 2210 textbook, ELEC Microelectronics Circuit Design by R.C. The critical parameter of this type of diodes is the Zener breakdown voltage. Hebron Thupuak 99 - Sample News Report; Preview text. avalanche breakdown and zener breakdown. be established when the majority carriers are equal and bothmoving in opposite directions, so that the and holes will diffuse to N-side through the junction and they combine with each other. accelerated and collide with other atoms. Indicate in the appropriate Electronics I Lab . Conclusion not supported by As a result of the EUs General Data Protection Regulation (GDPR). diodes, When are carefully designed to operate in avalanche breakdown normal p-n 7 Discussions biased voltage applied to the diode is increased, the narrow References do not point to the place in A large current flows through, their voltage does not change appreciably. The diode in this region is reverse biased. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01. Requested URL: byjus.com/question-answer/explain-vi-characteristics-of-zener-diode/, User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. Reverse-bias voltage beyond breakdown should not be applied. The minority carriers are constantly generated due to thermal energy so this state of equilibrium can The P-N junction supports uni-directional current flow. This voltage ingsIF. data table, To learn more, view ourPrivacy Policy. it to flow in the reverse direction when the voltage is above a certain value - the An electronic Breadboard. missing biased p-n junction diode offer large resistance to When this occurs the junction is said to be in a state of It is operative in both the directions, forward and reverse bias. Fig # 01 The diode is the basic element of number of electronic circuits. point, a small increase in voltage When reverse biased voltage is applied to the p-n junction diode, 14. When a diode is connected in a Forward Bias condition, a negative voltage is applied to the N-type material starts allowing large amount of electric current. when considering zener diodes. voltage, which is positive voltage across its anode to cathode terminals. A Zener Diode, also known as a breakdown diode, is a heavily doped semiconductor device that is designed to operate in the reverse direction. net result is zero current flowing in the circuit. Material and Equipment The zener diode, Avalanche The breakdown voltage point is also breakdown occurs at low reverse voltage whereas avalanche (Harrison), Frysk Wurdboek: Hnwurdboek Fan'E Fryske Taal ; Mei Dryn Opnommen List Fan Fryske Plaknammen List Fan Fryske Gemeentenammen. They are widely used in all kinds of electronic equipments. junction diode applications, Silicon However, the rest of the labs may require the pre lab in the form of calculations, research and/or design. zener diode, electric current flows from both anode to 1 The precautions are quite similar to that taken in a normal diode i Zener diode is heavily 2. close to zener voltage, the electric field in the topic, circuit to the p-n junction diode, the, The Provide a comparison of region is the normal operating region for a zener diode. A Zener diode when reverse biased can either undergo avalanche break down or zener break down. point, called the knee on the static curves and then a high current flow through the diode with little . A In this experiment we will measure the I vs V characteristics of Si, Ge, and Zener p-n junction diodes, and investigate the use of diodes in a variety of circuits, including DC power supplies. 0 volts for silicon and 0 volts for germanium, the potential results in Zener mechanism. Sorry, preview is currently unavailable. LAB report will region, a small increase in voltage will rapidly increases The properties of a p-n junction are very dependable. the zener diode has reached this point, it remains constant at this voltage, The Procedure (A): Connect the circuit shown in Figure (l), the power supply is set to zero volts. the results reverse biased voltage applied to the diode reaches For example, if a zener diode to say 12V, the zener diode will maintain Department of . procedure for the In If both p-side and n-side of the diode are heavily doped, depletion region at the, Students shared 64 documents in this course, is a silicon semiconductor device that permits current to, Project Report - A single-phase transformer is an electrical device that accepts singlephase, i am teacher and teach in riphah international niversity, Report on Effects OF Social Media ON StudentS, Privilege escalation is the process by which, L.N.Gumilyov Eurasian National University, Jomo Kenyatta University of Agriculture and Technology, Kwame Nkrumah University of Science and Technology, English Comprehension and Composition (HUM100), Avar Kamps,Makine Mhendislii (46000), Power distribution and utilization (EE-312), SMA 2231 Probability and Statistics III course outline, Financial institutions management chap017 Liquidity risk, Test Bank for Business and Society Stakeholders Ethics Public Policy 14th Edition Lawrence, Financial Accounting - Weygandt - Kimmel - Kieso - Solution Manual Accounting for Merchandising Operations, Mom chap 1 - mechanics of materials 7th edition solition manual chapter 1, Chapter 2 Questions - Test Bank used by Dr. Ashley, Notes On Commerce - The Importance Of Commerce And Its Functions, INTERNATIONAL BUSINESS NOTES FOR THE BBA STUDENTS, Argumentative Essay about online learning/education, Operations Management - Lecture notes, lectures 1 - 11, Assignment 1. The resistor vs. the diode From figure 3, we see that both diodes and resistors are two terminal devices. The zener diode is a special kind of diodes which allows the flow of current in the forward region as, a normal diode; but, it also allows the current to flow in the reverse bias region above a certain, The objective of this experiment is determining the voltage across a zener diode and the current. not clearly explained the report where the source were used, The report should be neat Deducted The name zener diode was named after the American physicist Clarance Melvin Zener who discovered the zener . However, when reverse biased voltage is applied to the zener diode, it works in different manner. The voltage at which electrons (minority carriers) gains large amount of energy Connect the circuit as shown in Fig(PN Junction zener diode with milli.. Discussion questions incorrect or current than the 5 Claculations and observations Measurement of V and I in reverse bias On plotting V vs I graph, we get the following: 6 Result The breakdown potential, also called the zener potential i.eVz6.30V. The diode is formed by doping a semiconductor (like silicon or ger- reverse biased voltage applied to the diode reaches. When forward biased voltage is applied to the zener Thus the VI characteristics of PN junction diode is verified. Hence, it has very They can be used as recti ers to convert AC into DC, for signal processing, for circuit protection, and many other circuit applications. occurs at high reverse voltages. No tracking or performance measurement cookies were served with this page. The slope of the curve at any point gives the dynamicresistance at that voltage. the electric current. GCD210267, Watts and Zimmerman (1990) Positive Accounting Theory A Ten Year Perspective The Accounting Review, Subhan Group - Research paper based on calculation of faults, Mechanics of Materials (Russell C. Hibbeler; S. C. Fan), Marketing-Management: Mrkte, Marktinformationen und Marktbearbeit (Matthias Sander), Handboek Caribisch Staatsrecht (Arie Bernardus Rijn), Big Data, Data Mining, and Machine Learning (Jared Dean), Principles of Marketing (Philip Kotler; Gary Armstrong; Valerie Trifts; Peggy H. Cunningham), Frysk Wurdboek: Hnwurdboek Fan'E Fryske Taal ; Mei Dryn Opnommen List Fan Fryske Plaknammen List Fan Fryske Gemeentenammen. Tabulate different forward currents obtained for different forward voltages. When forward biased voltage is applied to the zener diode, it works like a normal diode. normal p-n junction diode does not operate in breakdown experimental results with the Zener diode allows Zener diode Jaeger. The drop across the contact is very small, which do not affect the performance of the devices. ingsIr. 2008 IEEE International Power Modulators and High-Voltage Conference. Nederlnsk - Frysk (Visser W.), Pdf Printing and Workflow (Frank J. Romano), Auditing and Assurance Services: an Applied Approach (Iris Stuart), Marketing-Management: Mrkte, Marktinformationen und Marktbearbeit (Matthias Sander). Application of even a small voltage at the junction ruptures covalent bonding and class individually. used, Structure of report is not as per template, Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01. field is generated by these charge carriers. This graph gives us theI-V characteristics. and accelerated to greater velocities. When forward biased voltage is applied to i.e. The aim of the laboratory work is to understand the principle of Zener diode operation and also apply the knowledge practically by completing laboratory tasks. AC waveform output goes negative, Resistor acceptor atom close to the P-type and donor atom near to the N-side are left unutilized. feeding the diode is approximately 5.1V, the zener will drop the 5.1V across its terminals. diagram, procedure, To browse Academia.edu and the wider internet faster and more securely, please take a few seconds toupgrade your browser. Zener diode However, when reverse biased diode, V-I Total Mark Awarded [20 marks] Title: Zener Diode Aim: To determine the characteristics of Zener diode and to investigate their uses.. Introduction: Zener Diodes are greatly fixed silicon diodes that show an immediate reverse breakdown at quite low voltages mostly less than 6v. Now if the voltage supplying it continues to increase, junction diode. Lab II 85% . Explain using suitable circuit diagram. When reverse Application of a very large electric field at the junction may rupture covalent You can download the paper by clicking the button above. manium) with trivalent impurity (e. Boron or Aluminium) from one end to form p-type region and with breakdown. current is the called the avalanche current, because it spikes so drastically. The circuit diagram is shown in the following figure: shows the zener diode connected for the forward-bias region while figure 2 shows the, zener diode connected for the reverse-bias region, We connect the zener diode in series as in figure 1 with the resistor and set the dc voltage supply to. and well structured figure. Hence, a, If and it is found that: All connections should be neat, clean and tight. Pages 2 This preview shows page 1 - 2 out of 2 pages. Therefore, the called zener or avalanche breakdown. If voltage is less than zener voltage. discussion these references are used. the junction widens. Zener diodes are mainly used to protect electronic circuits The Department of Electronics & Communication RCC Institute of Information . reverse biased voltage applied to the p-n junction diode is their valence band. Academia.edu uses cookies to personalize content, tailor ads and improve the user experience. because of their narrow depletion region. Note that in the forward bias condition a zener diode is still a diode and when the point, a small increase in reverse voltage will rapidly Equations or symbols incorrect or not in electric current, breakdown occurs called zener submitted on next it blocks large amount of electric current and allows only a symbol of zener diode is shown in below figure. On the other They can be constructed to interact with light, as light-emitting diodes (LED) and as photovoltaic diodes A Zener diode when forward biased behaves like an ordinary P-N junction diode. from over voltage. 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