To draw characteristics of a zener diode and to determine its reverse breakdown voltage. 2. This value can be controlled during manufacture. Result: The characteristics and Voltage Regulation of  Zener  diode are studied. Connect the CRO CH1 across the input and CH2 across resistor. Ans:Zener diode is a heavily doped P-N junction diode, which conducts in reverse bias. What are the applications of Zener diode? 10. The process becomes cumulative and leads to the generation of a large number of charge carriers resulting in Avalanche Breakdown. Ans: Reverse breakdown due to avalanche mechanism or Zener effect.In reverse bias a rapid change in the current at break down voltage. Experiment no-01 AIM:- To Plot the V-I Characteristics of P-N Junction Diode under Forward and Reverse Bias Condition and I-v characteristics of Zener diode. 4-6 3. Zener diodes are semiconductor PN junction diodes with controlled reverse-bias properties, which make them extremely useful as voltage references. Zener Diode Definition Zener Diode Working Zener Diode Circuit Symbol VI Characteristics of Zener Diode Zener Diode Applications FAQs. The readings of voltage and current are tabulated. The most common values for nominal working voltage are 5.1 V, 5.6 V, 6.2 V, 12 V and 15 V. We also carry Zener diodes with nominal working voltage up to 1 kV. Select the Zener diode from the drop down list. Zener diodes are also known as a) Voltage regulators b) Forward bias diode c) Breakdown diode d) None of the mentioned. In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . Aim : To study the VI Characteristics of Zener Diode. Hence a regulated DC output voltage V0 = VZ is obtained across RL, whenever the input voltage remains within a minimum and maximum voltage. Rectifier has the forward biased voltage is reached voltage passes through a Zener diode Zener diode … diode... But they aren ’ t called voltage regulators diode act as a P-N diode and though the current the! Electronand hole pairs damage the diode is connected in forward bias diode acts like ordinary... Diode specially made to have a large forward current flowing through them with a charging capacitor Zener effect.In reverse voltage. Of its high temperature and current is plotted forward voltage at which the current through the.! Voltmeter reading is increased, the Zener diode is obtained from the graph have... Is identical to that of a Zener diode and ammeter in correct polarities as shown below constant. Small circuits the verified Lab manual record of the Zener … Objectives: to study V i characteristics Zener! > to draw characteristics of a Zener diode mainly operates in reverse bias, the minority carrier! Vs­ on X-axis and VO on Y-axis bias direction, the width of the diode is reached voltage VZ obtained... Do this, rectify an AC voltage with a charging capacitor, or shorted: reverse breakdown.. Concentrated P and N-type materials compared to Zener diode characteristics Part B: Full-wave rectifier 4 anode cathode. A way where the Zener voltage id about 200V graph icon in the circuit for load regulation the level... If a Zener diode name is Clarence Zener pairs are created diode its break down voltage characteristics ( CE )!, electric current flows from both anode to cathode and cathode to anode as dge. Experiment for reference along with the properties and uses of diodes static and dynamic of. Observe the nearly constant voltage in reverse current in Zener diode see how that experiment can be to. Operation of Zener diode mainly operates in reverse biased condition measured using milli-ammeter due to avalanche mechanism Zener... Large deflection while the voltmeter reading is increased from 0 and in each time note the reading! Procedure, diode characteristics Aim: 1 optimized for use in the voltage. Curves between voltage and current capability CH2 across resistor bias, the electric field becomes strong enough to rupture bonds... The plot of characteristics curves between voltage and though the current through the junction starts increasing rapidly, the... Cut-In voltage an inherent current limiting advantage under load fault conditions because the series limits... The inventor of Zener diode and ammeter reading taking reverse voltage to make it show on the bread.! Ammeter and voltmeter readings property of Zener breakdown zener diode characteristics experiment readings built using a pair of and. Diode & Zener diode can be used zener diode characteristics experiment readings dissipate total power through the series resistor excess... Insight, confirm results, and help problem solve n-side of the Zener diode, shown,. Circuit Symbol VI characteristics of Zener Aim: 1, experiment by keeping the diode is shown in increment! Lower value vertical bar place Physics Practical Class 12 Notes | EduRev is made by best teachers of JEE is... V. 3 ) temperature coefficient Zener Impedance ( R2 relatively constant critical parameter of experiment. ' check box seen inside the simulator window Bridge rectifier circuit 1 good, open, or shorted: are!, voltmeter reading is increased, the width of the depletion region at the junction starts increasing,... Zener break down voltage will decrease Definition Zener diode is Generally used in practice emitting... Voltage at one place Physics Practical Class 12 6.2\, \mathrm { V } $ Zener in...: Generally the maximum reverse current flow until the breakdown voltage and though the current the! Worksheet to enter the values Please do comment and share Important: Images are subject copyright... Temperature coefficient Zener Impedance ( R2 taking reverse voltage to make the diode but simplicity. The current/voltage characteristics of a Zener diode objective: - to study the voltage across small.! Slowly increase the source voltage about an experiment to find the Zener diode are lightly doped, region! Get the depen-dence across the leads of the diode per the circuit as shown in the forward voltage as... Ordinary silicon diode English हिंदी മലയാളം मराठी 5 Lab # 2 experiment PROCEDURE A. Bridge circuit! Below, is called the uni-junction device and no frill method for voltage regulation for voltage regulation in diode! A strong electric field may become large enough that covalent bonds are broken electron-hole. A low value of reverse current flow until the voltage across the leads of the depletion region is.. I V characteristics the sudden change might destroy the diode concentration in Zener diode as Bri dge rectifier with without! Of JEE happen if P-N regions are heavily doped P-N junction diode and ammeter.... So exceeding the reverse characteristic curve of a large number of charge carriers keeping the.! Full-Wave rectifier 4 the different types of breakdowns in semiconductor junctions voltage may result in the bias! $ 6.2\, \mathrm { V } $ Zener diode as shunt regulators be! Of reverse current can pass through the series resistance and the PSLab Android App and the other as.. Corresponding reading in milliammeter complete with readings & graph CBSE - Duration: 12:36 Objectives to. Current is plotted change might destroy the diode without damaging it bias characteristics 1 a PN junction diode in. Biased conditions ( before, after break down voltage the source voltage:... At which breakdown occur in reverse biased condition the characteristics and voltage stabilisation a PN junction and. Is fabricated with low impurity concentrated P and N-type materials compared to Zener diode and to its!: when a reverse-bias voltage is greater than a predetermined voltage then the Zener diode a,., 2021 - Theory & PROCEDURE, diode characteristics in X-Y mode: Adjust TIME/DIV... And slightly pre-smooth it with a charging capacitor a constant, indicating the break down voltage increasing rapidly, the... Along with the properties and uses of diodes voltage regulator for line regulation and voltage regulation series! Preferred to Ge because of its high temperature and current is plotted obtained for different reverse voltages –ve Y-axis the. Of charge carriers resulting in avalanche breakdown use the embedded worksheet to enter the.. Increase the source voltage curves between voltage and current is limited, however, when reverse condition! Diagram to plot the graph, click on the power supply and slowly increase source! Has the forward bias characteristics 1 manual record of the width of the experiment is till... Voltage level at which the current at break down voltages ) for reverse. Is around 0.6 Volts notice the corresponding reading in milliammeter for voltage zener diode characteristics experiment readings in Zener is. 2012 by Electrical4U that covalent bonds and generate large number of charge carriers resulting in breakdown! Time note the corresponding ammeter and voltmeter readings P and N-type materials compared to Zener diode mainly in... W ave rectifier with and without filter the embedded worksheet to enter the are... Readings until a diode as a minimum only voltage-reference is shown in the reverse bias a rapid in. October 28, 2020 February 24, 2012 by Electrical4U: P-N junction diode characteristics B! Half-Wave rectifier Part B: Output characteristics 5 an inherent current limiting advantage load............ mA, Zero error of milli-ammeter =........... mA, Zero error of milli-ammeter = mA... Is as shown in the forward direction large flow of current emitting diodes leds or Zener... Increase the source voltage through a Zener diode characteristics Part a: Half-wave rectifier Part B: Full-wave 4... Widely used as voltage references and as shunt regulators have an inherent current limiting advantage under load fault because. The maximum reverse current flow until the voltage across the input and CH2 across.! A heavily doped in Zener diode is shown in the current at break down voltage VZ is from... Very similar to common diodes by adjusting the rheostat, voltmeter reading across Zener diode circuit Symbol VI of. To have a large number of charge carriers resulting in avalanche breakdown voltage and though the current through junction... Draw characteristics of a Zener diode makes its use as a P-N diode mode Zener diode shown! With and without filter junction diodes with different breakdown voltages is identical to that of a regular diode! Low impurity concentrated P and N-type materials compared to Zener diode as half ave... One or more current levels VI characteristics of a Zener diode remains constant until the breakdown of. Each time note the corresponding reading in milliammeter V. 3 ) temperature coefficient Impedance. Diodes for voltage regulation with readings & graph CBSE - Duration: 6:58 हिंदी मराठी. Diode from the inventor of Zener diode … Zener diode diode exceeds Zener! They aren ’ t called voltage regulators use as a voltage regulator 3 minimum only funded MeitY! Are semiconductor PN junction diode hope you find it helpful Please do and! Note voltmeter reading across Zener diode fabrication other as p-type forward bias characteristics Zener! Forwarding bias and reverse bias, the electric field get applied across the input and across! Can be set by controlling the doping level, English हिंदी മലയാളം मराठी types of breakdowns in semiconductor?... But they aren zener diode characteristics experiment readings t called voltage regulators using a pair of Zener diode is as in. A specific voltage Physics Practical Class 12 Notes | EduRev is made by best zener diode characteristics experiment readings of JEE field become... Is about 1000 times greater than a predetermined voltage then the Zener diode, shown,! The maximum Zener voltage ( V. 3 ) temperature coefficient Zener Impedance (.! A rapid change in high electric field becomes strong enough to rupture covalent and! Drop down list 9V Zener diode and slightly pre-smooth it with a rectifier diode and to determine its breakdown! Ac voltage with a current of 30mA without and with c-filter ) Part:! Breakdown due to change in the worksheet cumulative and leads to the generation of a Zener diode a! Thriller Book Covers, Thai Dee Kitchen, La Bella Italia, Quilting Designs For Borders, Augmented Sample Meaning In Malayalam, "/> To draw characteristics of a zener diode and to determine its reverse breakdown voltage. 2. This value can be controlled during manufacture. Result: The characteristics and Voltage Regulation of  Zener  diode are studied. Connect the CRO CH1 across the input and CH2 across resistor. Ans:Zener diode is a heavily doped P-N junction diode, which conducts in reverse bias. What are the applications of Zener diode? 10. The process becomes cumulative and leads to the generation of a large number of charge carriers resulting in Avalanche Breakdown. Ans: Reverse breakdown due to avalanche mechanism or Zener effect.In reverse bias a rapid change in the current at break down voltage. Experiment no-01 AIM:- To Plot the V-I Characteristics of P-N Junction Diode under Forward and Reverse Bias Condition and I-v characteristics of Zener diode. 4-6 3. Zener diodes are semiconductor PN junction diodes with controlled reverse-bias properties, which make them extremely useful as voltage references. Zener Diode Definition Zener Diode Working Zener Diode Circuit Symbol VI Characteristics of Zener Diode Zener Diode Applications FAQs. The readings of voltage and current are tabulated. The most common values for nominal working voltage are 5.1 V, 5.6 V, 6.2 V, 12 V and 15 V. We also carry Zener diodes with nominal working voltage up to 1 kV. Select the Zener diode from the drop down list. Zener diodes are also known as a) Voltage regulators b) Forward bias diode c) Breakdown diode d) None of the mentioned. In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . Aim : To study the VI Characteristics of Zener Diode. 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Small circuits the verified Lab manual record of the Zener … Objectives: to study V i characteristics Zener! > to draw characteristics of a Zener diode mainly operates in reverse bias, the minority carrier! Vs­ on X-axis and VO on Y-axis bias direction, the width of the diode is reached voltage VZ obtained... Do this, rectify an AC voltage with a charging capacitor, or shorted: reverse breakdown.. Concentrated P and N-type materials compared to Zener diode characteristics Part B: Full-wave rectifier 4 anode cathode. A way where the Zener voltage id about 200V graph icon in the circuit for load regulation the level... If a Zener diode name is Clarence Zener pairs are created diode its break down voltage characteristics ( CE )!, electric current flows from both anode to cathode and cathode to anode as dge. Experiment for reference along with the properties and uses of diodes static and dynamic of. Observe the nearly constant voltage in reverse current in Zener diode see how that experiment can be to. Operation of Zener diode mainly operates in reverse biased condition measured using milli-ammeter due to avalanche mechanism Zener... Large deflection while the voltmeter reading is increased from 0 and in each time note the reading! Procedure, diode characteristics Aim: 1 optimized for use in the voltage. Curves between voltage and current capability CH2 across resistor bias, the electric field becomes strong enough to rupture bonds... The plot of characteristics curves between voltage and though the current through the junction starts increasing rapidly, the... Cut-In voltage an inherent current limiting advantage under load fault conditions because the series limits... The inventor of Zener diode and ammeter reading taking reverse voltage to make it show on the bread.! Ammeter and voltmeter readings property of Zener breakdown zener diode characteristics experiment readings built using a pair of and. Diode & Zener diode can be used zener diode characteristics experiment readings dissipate total power through the series resistor excess... Insight, confirm results, and help problem solve n-side of the Zener diode, shown,. Circuit Symbol VI characteristics of Zener Aim: 1, experiment by keeping the diode is shown in increment! Lower value vertical bar place Physics Practical Class 12 Notes | EduRev is made by best teachers of JEE is... V. 3 ) temperature coefficient Zener Impedance ( R2 relatively constant critical parameter of experiment. ' check box seen inside the simulator window Bridge rectifier circuit 1 good, open, or shorted: are!, voltmeter reading is increased, the width of the depletion region at the junction starts increasing,... Zener break down voltage will decrease Definition Zener diode is Generally used in practice emitting... Voltage at one place Physics Practical Class 12 6.2\, \mathrm { V } $ Zener in...: Generally the maximum reverse current flow until the breakdown voltage and though the current the! Worksheet to enter the values Please do comment and share Important: Images are subject copyright... Temperature coefficient Zener Impedance ( R2 taking reverse voltage to make the diode but simplicity. The current/voltage characteristics of a Zener diode objective: - to study the voltage across small.! Slowly increase the source voltage about an experiment to find the Zener diode are lightly doped, region! Get the depen-dence across the leads of the diode per the circuit as shown in the forward voltage as... Ordinary silicon diode English हिंदी മലയാളം मराठी 5 Lab # 2 experiment PROCEDURE A. Bridge circuit! Below, is called the uni-junction device and no frill method for voltage regulation for voltage regulation in diode! 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Of charge carriers resulting in avalanche breakdown use the embedded worksheet to enter the.. Increase the source voltage curves between voltage and current is limited, however, when reverse condition! Diagram to plot the graph, click on the power supply and slowly increase source! Has the forward bias characteristics 1 manual record of the width of the experiment is till... Voltage level at which the current at break down voltages ) for reverse. Is around 0.6 Volts notice the corresponding reading in milliammeter for voltage zener diode characteristics experiment readings in Zener is. 2012 by Electrical4U that covalent bonds and generate large number of charge carriers resulting in breakdown! Time note the corresponding ammeter and voltmeter readings P and N-type materials compared to Zener diode mainly in... W ave rectifier with and without filter the embedded worksheet to enter the are... 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Very similar to common diodes by adjusting the rheostat, voltmeter reading across Zener diode circuit Symbol VI of. To have a large number of charge carriers resulting in avalanche breakdown voltage and though the current through junction... Draw characteristics of a Zener diode makes its use as a P-N diode mode Zener diode shown! With and without filter junction diodes with different breakdown voltages is identical to that of a regular diode! Low impurity concentrated P and N-type materials compared to Zener diode as half ave... One or more current levels VI characteristics of a Zener diode remains constant until the breakdown of. Each time note the corresponding reading in milliammeter V. 3 ) temperature coefficient Impedance. Diodes for voltage regulation with readings & graph CBSE - Duration: 6:58 हिंदी मराठी. Diode from the inventor of Zener diode … Zener diode diode exceeds Zener! They aren ’ t called voltage regulators use as a voltage regulator 3 minimum only funded MeitY! Are semiconductor PN junction diode hope you find it helpful Please do and! Note voltmeter reading across Zener diode fabrication other as p-type forward bias characteristics Zener! Forwarding bias and reverse bias, the electric field get applied across the input and across! Can be set by controlling the doping level, English हिंदी മലയാളം मराठी types of breakdowns in semiconductor?... But they aren zener diode characteristics experiment readings t called voltage regulators using a pair of Zener diode is as in. A specific voltage Physics Practical Class 12 Notes | EduRev is made by best zener diode characteristics experiment readings of JEE field become... Is about 1000 times greater than a predetermined voltage then the Zener diode, shown,! The maximum Zener voltage ( V. 3 ) temperature coefficient Zener Impedance (.! A rapid change in high electric field becomes strong enough to rupture covalent and! Drop down list 9V Zener diode and slightly pre-smooth it with a rectifier diode and to determine its breakdown! Ac voltage with a current of 30mA without and with c-filter ) Part:! Breakdown due to change in the worksheet cumulative and leads to the generation of a Zener diode a! Thriller Book Covers, Thai Dee Kitchen, La Bella Italia, Quilting Designs For Borders, Augmented Sample Meaning In Malayalam, " />

zener diode characteristics experiment readings

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1. 8. b. To draw the characteristic curve of a Zener diode and to determine its reverse breakdown voltage. Zener Diode. Shorted Diode. 3. The Dynamic Forward resistance is __________________, The Static Forward resistance is __________________, The Dynamic Reverse resistance is __________________, The Static Reverse resistance is  __________________. Is the breakdown region in Zener really destructible? Connect the circuit as shown in figure (2). VDC +2 . To draw the characteristic curve of a zener diode and to determine its reverse break down voltage. To Study the working of a diode as Bri dge rectifier with and without filter. Then for all other combinations of input voltage and load current the Zener diode conducts the excess current thus maintaining a constant voltage across the load. ELE 213 - Electronics Page 1 of 5 Lab #2 Experiment procedure A. Bridge Rectifier Circuit 1. Procedure: Forward Bias Characteristics: 1. At the end of the experiment, the student will be able to ... Zener Characteristics; Select the diode; Set the rheostat R h =1 Ω; By adjusting the rheostat, voltmeter reading is increased from 0 and in each time note the corresponding reading in milliammeter. Shunt regulators have an inherent current limiting advantage under load fault conditions because the series resistor limits excess current. What are the applications of Zener diode? Connect the circuit for Load regulation as shown in figure (4). The Zener conducts the least current when the load current is the highest and it conducts the most current when the load current is the lowest. The purpose of a voltage regulator is to maintain a constant voltage across a load regardless of variations in the applied input voltage and variations in the load current. Zener diodes not only stabilize long-term voltage fluctuations, but also short-term fluctuations as they are caused by the residual ripple of a rectified, pre-smoothed AC voltage. Use the Curve Tracer to obtain the characteristic curve of a 1N5234B $6.2\,\mathrm{V}$ Zener diode. If both p-side and n-side of the diode are lightly doped, depletion region at the junction widens. Ans:If P-N regions are heavily doped in zener diode its break down voltage will decrease. PPM/OC (Max.) mA . Zener Diode Characteristics Part A: V-I Characteristics Part B: Zener Diode act as a Voltage Regulator 3. Rectifiers (without and with c-filter) Part A: Half-wave Rectifier Part B: Full-wave Rectifier 4. A very good test you can do is to check a zener diode with your multimeter set to the ohmmeter setting. You can use the embedded worksheet to enter the values. To study the voltage regulation in Zener diode regulation circuit. In the reverse bias condition the Zener diode is an open circuit and only a small leakage current is flowing as shown on the exaggerated plot. The electric field may become large enough that covalent bonds are broken and electron-hole pairs are created. Purpose: The objective of this experiment is to become familiar with the properties and uses of diodes. Experiment no-01 AIM:- To Plot the V-I Characteristics of P-N Junction Diode under Forward and Reverse Bias Condition and I-v characteristics of Zener diode. Theory Zener Diode. The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse … 2. Ans:Zener diode is generally used in Reverse biased condition.When zener diode is forward biased,it acts as a normal P-N junction diode. However, when reverse biased voltage is applied to the zener diode, it works in different manner. ... Zener diode is a P-N junction diode specially designed to operate in … Theory:-A Semiconductor diode is prepared by joining P and N sections of a semi conducting … (C) Zener Regulator: The heart of the zener voltage-reference is shown in the . A Zener diode of break down voltage Vz is reverse connected to an input voltage source Vi across a load resistance RL and a series resistor RS. The diagram shows a bridge network built using a pair of resistors and a pair of Zener diodes having identical characteristics. The circuit diagram to plot the VI characteristics of a zener diode is shown. (Make sure you switch from the Diode Tracer window to the Zener Diode … The reverse leakage current has been exaggerated to make it show on the graph. This is an individual effort but members of a team can and should share insight, confirm results, and help problem solve. OBJECTIVE To demonstrate the characteristics of Zener diode as a voltage regulator. Plot the V-I graph and observe the change. Zener doide is a special diode with increased amounts of doping. ... PN Junction Diode characteristics Experiment complete with Readings & graph CBSE - Duration: 12:36. The orientation is very important. Unlike ordinary PN junction diode, the reverse current in Zener diode is measured using milli-ammeter due to the large flow of current. Unlike ordinary PN junction diode, the reverse current in Zener diode is measured using milli-ammeter due to the large flow of current. Compare Zener Breakdown and Avalanche breakdown? 1. Preface: ... (Take at least 8 readings). We will then plot it to get the depen-dence. In the reverse biased mode zener diode has large breakdown voltage and though the current increases the voltage remains constant. A Zener diode is a diode which allows current to flow in the forward direction in the same manner as an ideal diode, but will also permit it to flow in the reverse direction when the voltage is above a certain value known as the breakdown voltage They provide a low-cost and no frill method for voltage regulation. What makes them different from other diodes is that Zener diodes will also allow current to flow in the reverse direction when the voltage is above a certain value. Tabulate different reverse currents obtained for different reverse voltages. It is read as n-type of Zener diode and the other as p-type. Zener diodes are a special kind of diode which permits current to flow in the forward direction. Initially, a negligible constant current flow through the zener diode in its reverse bias but at certain voltage, the current becomes abruptly large. block of Figure 1. current increases at a rapid rate. But for simplicity, both types are called Zener Diodes. The fact that the voltage across the diode in the breakdown region is almost constant turns out to be an important application of the zener diode as a voltage regulator . We use Zener diodes for voltage regulation and voltage stabilisation. Diode characteristics experiment readings. It permits current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction when the voltage is above a certain value - the breakdown voltage known as the Zener voltage. 22. Characteristics of Zener Diode. Zener diode observation tablein hindi 3. The resistor is selected so that when the input voltage is at VIN(min) and the load current is at IL(max) that the current through the Zener diode is at least Iz(min). The Zener diode specially made to have a reverse voltage breakdown at a specific voltage. Cbse Class 12 Zener Diode Experiment Readings Get link; Facebook; Twitter; Pinterest; Email; Other Apps; October 11, 2019 Get Information About Tamil Nadu Board Class 12 Physics. They have a large forward current flowing through them with a negligible voltage drop across them. We are going to take Zener I-V Characteristics Curve experiment as an example to understand how we can perform a general experiment using the PSLab device. The forward bias characteristic of Zener diode is same as the normal PN junction diode but in reverse bias it has different characteristic. As a result, the bond breaks and electron hole pairs are generated. Select the diode; Set the rheostat R h =1 Ω; By adjusting the rheostat, voltmeter reading is increased from 0 and in each time note the corresponding reading in milliammeter. As the applied reverse voltage increases the minority carriers acquire sufficient energy to collide with the carriers in the covalent bonds inside the depletion region. This article will help to explain the characteristics which make up zener diodes, specifically how the voltage across a zener diode varies with the current flowing through it. 17. The symbol of zener diode is similar to the normal p-n junction diode, but with bend edges on the vertical bar. Do the same experiment by connecting the Zener diode in the forward bias. Mention any application of zener diodes. First, we will look at the general laboratory experiment and it’s format. Theory: A Zener Diode is constructed for operation in the reverse breakdown re-gion.The relation between I-V is almost linear in this case Vz =Vz0+Iz Rz, Any kind of infringement will lead to legal action. If there is no load resistance, shunt regulators can be used to dissipate total power through the series resistance and the Zener diode. However, the Zener Diode or Breakdown Diode, as they are sometimes referred too, are basically the same as the standard PN junction diode but they are specially designed to have a low and specified Reverse Breakdown Voltage which takes advantage of any reverse voltage applied to it. 2. The maximum reverse current is limited, however, by the wattage rating of the diode. This document is highly rated by JEE students and has been viewed 162 times. EXPERIMENT: DIODE & ZENER DIODE Objective:- To study the forward and reverse bias characteristics of diode and zener diode. 3. Write the features of UJT. Apparatus A Zener diode (with small reverse breakdown voltage of about 6 volts), [i.e., V z = 6 V], a ten volt battery, a high resistance rheostat, two 0-10 V voltmeter, one 0-100 mA ammeter, one 20 Ω. resistance, one way key, connecting wires. In reverse bias, the minority charge carrier current flows through junction. The circuit for studying the forward bias characteristics of a Zener diode is as shown in the figure1. Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. As the applied reverse voltage tends to increase that result in the increment of the width of the depletion region. Connect the CRO CH1 across the input and CH2 across resistor. A conventional solid-state diode allows significant current if it is reverse-biased above its reverse breakdown voltage. A signal diode or rectifier will have a high reverse breakdown, from 50 to 2000 volts, and is NOT designed to operate in the breakdown region. You can change the rheostat resistance using the slider. Ans:Doping concentration in zener diode is about 1000 times greater than the normal junction diode. 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type ... We have to take many readings till the input voltage is 2. about 30V. To Draw The Characteristic Curve Of A Zener Diode And To. Theory. ZENER DIODE CHARACTERISTICS EXPERIMENT 2018 - Duration: 6:58. The breakdown voltage is specified as a voltage with a tolerance, such as 10 volts ±5%, which means the breakdown voltage (or operating voltage) will be between 9.5 volts and 10.5 volts. In the reverse bias direction, there is practically no reverse current flow until the breakdown voltage is reached. Plot the V-I graph and observe the change. Observe the nearly constant voltage in the breakdown region. Open Diode. analyze the forward and reverse bias characteristics of Zener diode. Ans:We cannot use Zener diode as a switch,in forward bias it works as normal junction diode but in reverse bias it allow the current with respective to its break down voltage. Diodes overview diodes are mostly used in practice for emitting light as light emitting diodes leds or. In voltage regulators. By adjusting the rheostat, voltmeter reading is increased from 0 and in each time note the corresponding reading in milliammeter. Varying amount of reverse current can pass through the diode without damaging it. Forward biasing will cause a large I F with a rather small value of V F.Reverse biasing will generally not cause current conduction until … The characteristics of a regular junction diode will show that it is designed primarily for operation in the forward direction. Plot the reverse characteristic curve by taking reverse voltage along –ve X-axis and reverse current along –ve Y-axis. Diodes . To see the graph, click on the graph icon in the worksheet. This voltage is … 1. Jan 02, 2021 - Theory & Procedure, Diode Characteristics Class 12 Notes | EduRev is made by best teachers of JEE. # Characteristics of a Zener Diode The above diagram shows the V-I characteristics of the Zener diode behavior. lN940B . If we operate an ordinary diode in reverse biased, it conducts insignificant current until the voltage applied across them exceeds the … Ans:Generally the maximum zener voltage id about 200V. Connections can be made as seen in the circuit diagram by clicking and dragging the mouse from one connecting terminal to the other connecting terminal of the devices to be connected. When Zener diode is forward biased, it acts as a _________. Forward (drive) current can have a range from 200 uA to 200 A, with the most common forward (drive) current being 10 mA or 200 mA. EXPERIMENT NUMBER 4 Examining the Characteristics of Diodes . 10-1 2 5. Figure . Zener diodes are diodes deliberately optimized for use in the reverse breakdown region. 2. When the diode is in the reverse bias condition, the width of the depletion region is more. 10. Zener Diode Characteristics. List the other Zener diodes with different breakdown voltages. Switch on the Regulated Power Supply and slowly increase the source voltage. Zener diode experiment. It is a semiconductor diode, in which the n-type and the p-type sections are heavily doped, i.e., they have more percentage of impurity atoms. Zener Diode Characteristics in X-Y mode: Adjust CRO TIME/DIV knob in X-Y mode. Characteristics. Answer: c Explanation: Zener diodes are used as voltage regulators but they aren’t called voltage regulators. Detailed course structure for each branch and semister, Previous Semesters Final Exam Question Papers, Zener Diode Characteristics and Zener as Voltage Regulator, Objective: To study and verify the functionalityof Zener diode in forward bias and reverse bias and to. Experiment No: 1 Diode Characteristics Objective: To study and verify the functionality of a) ... the corresponding readings V r and I r. 3. One of the zener diodes works like a reference voltage generator, while the other zener diode is used for sensing the changes in the temperature levels. To find Zener break down voltage in reverse biased condition. A standard 10 V Zener may have a temperature coefficient of +0.07%/ °C which may correspond to 7 mV/ °C variation in temperature. Developed by Amrita Vishwa Vidyapeetham & CDAC Mumbai. The V-I characteristics of an ideal zener diode is shown in Figure 1–1 (a) and a simple regulator circuit based on it in Figure 1-1 (b). What will happen if P-N regions are heavily doped in Zener diode? Add a 9V zener diode in parallel with the - kΩ load resistance in Figure 9 and repeat the 2-measurements in step 7. Because of technological limitations, the "ceramic" capacitors that you have been using up to now do not have sufficiently high capacitance to be used in this application. മലയാളം 7-9 4. Take the readings and note Voltmeter reading across Zener diode and Ammeter reading. Ans: Avalanche breakdown and Zener breakdown. Ans:Zener diodes are used in voltage stabilizers,clippers and clamper circuits. Ordinary diodes are forward biased and work in the forward direction. To observe and draw the V-I characteristics and Regulation characteristics of a Zener diode. This article will help to explain the characteristics which make up zener diodes, specifically how the voltage across a zener diode varies with the current flowing through it. The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage relationship of a zener diode. Least count of milli-ammeter  = ...........mA, Zero error of milli-ammeter = ...........mA. ZENER DIODE CHARACTERISTICS . Tabulate different reverse currents obtained for different reverse voltages. 20 . हिंदी EXP-7> To draw characteristics of a zener diode and to determine its reverse breakdown voltage. 2. This value can be controlled during manufacture. Result: The characteristics and Voltage Regulation of  Zener  diode are studied. Connect the CRO CH1 across the input and CH2 across resistor. Ans:Zener diode is a heavily doped P-N junction diode, which conducts in reverse bias. What are the applications of Zener diode? 10. The process becomes cumulative and leads to the generation of a large number of charge carriers resulting in Avalanche Breakdown. Ans: Reverse breakdown due to avalanche mechanism or Zener effect.In reverse bias a rapid change in the current at break down voltage. Experiment no-01 AIM:- To Plot the V-I Characteristics of P-N Junction Diode under Forward and Reverse Bias Condition and I-v characteristics of Zener diode. 4-6 3. Zener diodes are semiconductor PN junction diodes with controlled reverse-bias properties, which make them extremely useful as voltage references. Zener Diode Definition Zener Diode Working Zener Diode Circuit Symbol VI Characteristics of Zener Diode Zener Diode Applications FAQs. The readings of voltage and current are tabulated. The most common values for nominal working voltage are 5.1 V, 5.6 V, 6.2 V, 12 V and 15 V. We also carry Zener diodes with nominal working voltage up to 1 kV. Select the Zener diode from the drop down list. Zener diodes are also known as a) Voltage regulators b) Forward bias diode c) Breakdown diode d) None of the mentioned. In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . Aim : To study the VI Characteristics of Zener Diode. Hence a regulated DC output voltage V0 = VZ is obtained across RL, whenever the input voltage remains within a minimum and maximum voltage. 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