Once the values are found it should be plotted as characteristics curve. In the forward bias condition, the zener diode behaves like an ideal diode within specified current and power limits, but it differs in reverse bias condition where the zener diode has very steep avalanche characteristic at the breakdown voltage in reverse bias condition. With your lab partner, brainstorm on the following ideas: Objectives: • Obtain the I-V curves of a signal diode and a zener diode • Compare the performance of different rectifier circuits . In this article, we are going to explain Zener diode and its applications in detail. A Zener diode 2. Simulator . Zener diodes can be tested for opens, shorts, or leakage with an ohmmeter. Theory . Which is in A, will follow. This preview shows page 1 - 3 out of 8 pages. This property of zener diode makes its use as a voltage regulator. We will then plot it to get the depen-dence. A Zener Diode is a special kind of diode which 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 the breakdown voltage or ‘zener’ voltage.u000b Zener diodes are designed so that their breakdown voltage is much lower - for example just 2.4 Volts. Course Hero is not sponsored or endorsed by any college or university. Observe the nearly constant voltage in the breakdown region. To draw the characteristic curve of a Zener diode and to determine its reverse breakdown voltage. following equation and we can construct load line using this equation: For the part A, The purpose of the experiment is to find the characteristic of the zener diode. Select the Zener diode from the drop down list. Apparatus used: Zener diode, voltmeter (0-2volt), voltmeter (0-30 volt), mili-ammeter, micro- ammeter, variable source (0-2 volt and 0-30 volt). Only minority carriers cause small leakage current at reverse voltage. It is almost identical to the forward characteristics of a P-N junction diode. EXPERIMENT: DIODE & ZENER DIODE Objective:- To study the forward and reverse bias characteristics of diode and zener diode. Brief Theory: When a reverse-bias voltage is applied to a pn junction, the electric field in the space-charge region is increases. A graph of current through vs the voltage across the device is called the characteristic of Zener diode.The first quadrant is the forward biased region. Find Zener Breakdown Voltage in Reverse Biased conditions. On top of that, the transition into reverse breakdown is very sharp. Here V z is the Zener breakdown voltage. Typical diodes have a very high reverse breakdown voltage, the voltage at which the diode begins to conduct in the reverse direction. Objective: To study and verify the functionalityof Zener diode in forward bias and reverse bias and to Plot Volt-Ampere Characteristics of Zener Diode. Reverse Characteristics. Zener diode is nothing but a single diode connected in a reverse bias mode and Zener diode can be connected in reverse bias positive in a circuit as shown as picture. Zener diode characteristics 1 Experiment #5 Object To study and measure the effects of forward and reverse bias on the Zener diode current. The electric field may become large enough that covalent bonds are broken and, electron-hole pairs are created. The symbol of zener diode is similar to the normal p-n junction diode, but with bend edges on the vertical bar. Assignment . VI characteristics of zener diode. The VI characteristics of a zener diode … CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. To see the circuit diagram, click on the 'Show/hide circuit diagram' check box seen inside the simulator window. 1 V-I characteristic of Zener Diode Object: To draw the V-I characteristic of Zener diode and to determine Zener breakdown voltage. In general, the cathode of a diode is marked by a solid line on the diode.The First identify the terminals of Zener diode, there will be a black colored circular band on one side of the Zener diode. Due to heavily doped, its Normally this circuit used when a constant reference voltage is needed. We are going to learn about an experiment to find out the Zener breakdown voltage and draw the characteristics of Zener diode. The main aim of this experiment lies in to find out the basic value of the Zener voltage. If the current is not sufficiently limited, a large power can be dissipated in the junction that may, Diodes are intended to operate in the breakdown region. The P type has excess Experiment 7 Zener-Diode Characteristics 1- Objects of the Experiment: - Recording the current-voltage characteristic I Z f(V Z) of a Zener diode. The electric field may become large enough that covalent bonds are broken and electron-hole pairs are created. Calculate static and dynamic resistance of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). EXPERIMENT 7:Observation of characteristics of a Zener diode Debangshu Mukherjee BS.c Physics,1st Year Chennai Mathematical Institute 7.11.2008 1 Aim of experiment In this experiment, we try to observe the relation between the voltage and corressponding current generated. To study the voltage regulation in Zener diode regulation circuit. - Determining the quiescent point Q(VZ,IZ) - Determining the differential resistance of a Zener diode. Firstly t… Zener diode voltage regulator. To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. References: • EE 121 Handouts Objectives: To study the characteristics of Zener diode. We set the DC supply to 0 V and, We set the DC supply (E) to the values appearing in Table- 01 and measured both V, using the Ohmâs law given in the table and. Theory: Zener Diode: Zener diode is a heavily doped PN junction diode. Theory:-A Semiconductor diode is prepared by joining P and N sections of a semi conducting material like germanium or silicon. The layer at the junction of ‘P’ type and ‘N’ type. It operates in breakdown region because majority, carrier moves away from the junction cause the depletion region to increase and the current difficult to, flow. The circuit was constructed according to Figure- 02. Figure 1 shows the V-I char… Here the Zener diode acts like an ordinary diode.When a forward voltage is applied, current flows through it. Zener Diode I-V Characteristics Curve. To construct a Zener voltage regulator and experimentally determine the range over which the Zener maintains a constant output voltage. Do the same experiment by connecting the Zener diode in the forward bias. Electrons are swept into the n-region and holes are swept into the p-, region by the electric field, generating a large reverse bias current. Zener voltage is the basic voltage that is set as the cut-off value, and the breakdown value of the voltage must be lying close to the desired value that we want it is just approximated. You must also design a circuit that demonstrates the operation of a 7 V ± 5% loaded Zener regulator powered by a 12 V DC voltage source. The reverse-bias current created by breakdown mechanism is limited only by the external, circuit. To study the voltage regulation in Zener diode regulation circuit. 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. We are going to learn about an experiment to find out the Zener breakdown voltage and draw the characteristics of Zener diode.Why should we do this experiment? Zener diode has the property of behaving like a dc battery in ‘on’ state (i.e. We will learn about the V-I characteristics of Zener Diode and to draw the V-I characteristics graph. For correct voltage regulation, we need to find out precisely what voltage should be across the Zener diode.Zener breakdown voltage should be approximately close to the desired … In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . To plot Volt-Ampere characteristics of Zener diode. AÌ{K«aiX¹E[vßÚ_ÜBìß Ì §P!. 2. New York City College of Technology, CUNY, International Islamic University Malaysia (IIUM), UEEA1313_Chapter_1_Part_3_Special_Purpose_Diodes.pptx, Borough of Manhattan Community College, CUNY, University of Malaysia, Perlis â¢ BCP ET110, New York City College of Technology, CUNY â¢ EET 1240, International Islamic University Malaysia (IIUM) â¢ EECE 1312, University of California, Irvine â¢ EECS 70, Borough of Manhattan Community College, CUNY â¢ MAT 302, International Islamic University Malaysia (IIUM) â¢ ENGINE 1312. To study the characteristics of Zener diode. 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. 2- Principles Zener diodes are semiconductor diodes which are operated in the reverse direction As we increase the reverse voltage, initially a small reverse saturation current Io. Experiment No.4 Zener diode Characteristics Object: To study and measure the effects of forward and reverse bias on the zener diode current. The circuit for studying the forward bias characteristics of a Zener diode is as shown in the figure1. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts. In our previous articles, we explain in detail about diodes, PN junction diode, semiconductors etc. Resistors: 0.1kâ¦, 1kâ¦ (2 piece), 3.3kâ¦. Procedure . 6. Zener diodes are a special type of semiconductor diode– devices that allow current to flow in one direction only –that also allow current to flow in the opposite direction, but only when exposed to enough voltage. Zener Diode Definition Zener Diode Working Zener Diode Circuit Symbol VI Characteristics of Zener Diode Zener Diode Applications FAQs. A Zener diode not only allows current to flow from anode to cathode but also, in the reverse direction on reaching the Zener voltage. 3. Lab Report Experiment No- 02 - Objectives To study the characteristics of Zener diode To study the voltage regulation in Zener diode regulation circuit, 3 out of 3 people found this document helpful. CMvG¾½^ùññ ²ºÌJ6*Ú.g'C?¸ií÷4ÔÎðjç;¼Zãt±ë5ªc©Dô¬fcà åË1:zÀ ôaX£EÏ2h);(x1z-Ç.KÁüC¤MÝ³Õ;ÝöãZ­¥FCUóV, Zener Diode Characteristics - Zener regulator Prelab: You are tasked to determine experimentally the characteristic curve of a reverse-biased Zener diode. Zener diodes are used in application for, which a constant voltage in breakdown is desirable. When a reverse-bias voltage is applied to a pn junction, the electric field in the space-charge, region is increases. It is read as n-type of Zener diode and the other as p-type. This voltage is generally avoided in standard diodes, but Zener diodes are designed and manufactured to have a very specific reverse breakdown voltage. (Zener Diode V-I Characteristics) When the applied voltage exceeds an specific amount Zener breakdown takes place. Variable minimum supply voltage should be larger than, desired output voltage for the diode to operate in proper operation. To draw the characteristic curve of a zener diode and to determine its reverse break down voltage. To find Zener break down voltage in reverse biased condition. 3. EXPERIMENT NUMBER 4 ... characteristics of diodes and the use of diodes in rectifier and limiter circuits. Do check out – V-I characteristics of PN Junction Diode Zener diode is a special kind of diode which permits the flow of current in the forward direction as well as in reverse direction when the voltage is above a certain voltage known as breakdown or Zener voltage. Experiment No: 1 Diode Characteristics Objective: To study and verify the functionality of a) PN junction diode in forward bias b) Point-Contact diode in reverse bias ... Zener diode is a P-N junction diode specially designed to operate in the reverse biased mode. The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. The list of the componentsof equipment required to perform this experiment mainly include Zener diode, Milliammeter, Voltmeter, and DC supply(variable), and Resistors 1. 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 ... Characteristics of Zener diode.. 2. The Zener diode is a unique device which exploits a property of diodes that is generally avoided in standard diode applications. The current-voltage characteristic curve of the Zener diode is shown below. Breakdown voltage theoretically is equal to desired output voltage. But due to higher doping concentration, higher current flows through the Zener diode.In the third quadrant, the magic happens. This phenomenon is called, . As the breakdown voltage is appr… when the voltage across the zener diode exceeds its zener voltage rating VZ) . Fig 2:Zener diode characteristic curve The forward bias region of a Zener diode is identical to that of a regular diode. The function of R in this circuit is to, safe value so that the diode does not overheat. Required Parts and Equipment's 1. This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. Theoretically, Zener diode will, have zero current across it and the voltage across will be vertical line which is parallel to i, Also, the Zener diode will only be operate if the value of input voltage larger than, We can provide nearly constant output voltage from variable supply voltage by using simple. To determine whether a zener diode is regulat- ing at the proper voltage, a regulation test must be performed. The forward characteristics of a Zener diode is shown in figure. Procedure: Forward Bias Characteristics: 1. In Experiment B, a 6v Zener Diode used is conducting (the bulb comes on) in reverse biased because the applied voltage is greater than its breakdown voltage and thus shows that the breakdown region is the region of operation of the zener diode. It is acting To construct a zener voltage regulator and experimentally determine the range over which the zener maintains a constant output voltage. For part B, Value for current across R (I. calculated by using the equation below to find the experiment regulation. A Zener diode is a special type of diode designed to reliably allow current to flow "backwards" when a certain set reverse voltage, known as the Zener voltage, is reached.. Zener diodes are manufactured with a great variety of Zener voltages and some are even variable. For this circuit we can write the. Reference . 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type semiconductor material. Apparatus:-Experimental kit and patch cords. Figure 2 shows the current versus voltage curve for a Zener diode. Zener diode regulators provide a constant output voltage despite changes in the input voltage or output current. Forward Characteristics of Zener Diode. Feedback Unlike ordinary PN junction diode, the reverse current in Zener diode is measured using milli-ammeter due to the large flow of current. 3. 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. 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