The Ptype and N type semiconductors represent positive and negative type semiconductors. Zener doide is a special diode with increased amounts of doping. as the is a strong electric filed in the region of the junction that can disrupt 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? The output waveform may be observed in the waveform viewer. As the breakdown voltage is appro… To draw the characteristic curve of a zener diode and to determine its reverse break down voltage. The V-I characteristic of Zener diode indicates that characteristic of Zener diode in forward bias is same as PN junction diode. The circuit diagram to plot the VI characteristics of a zener diode is shown. When the reverse bias voltage is greater than a predetermined voltage then the Zener … startxref The, forward In Zener diode, for currents greater than the knee current, the v-i curve is … and breakdown occurs at low reverse voltage and the bias exceeds the breakdown voltage and thereby, Applying a positive potential value of 0 to final value of 1V in steps of 1mV. 28 0 obj <> endobj diagram is drawn by loading components from the library. 18 ZENER DIODE Experiment No. net assignment has. 0000001799 00000 n 0000016638 00000 n When forward biased voltage is applied to the zener diode, it works like a normal diode. endstream endobj 29 0 obj<> endobj 30 0 obj<> endobj 31 0 obj<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/ExtGState<>>> endobj 32 0 obj<> endobj 33 0 obj<> endobj 34 0 obj<> endobj 35 0 obj[/ICCBased 42 0 R] endobj 36 0 obj[/Indexed 35 0 R 255 43 0 R] endobj 37 0 obj[/Indexed 35 0 R 255 45 0 R] endobj 38 0 obj<> endobj 39 0 obj<> endobj 40 0 obj<> endobj 41 0 obj<>stream 1N4739 zener diode . In reverse bias, a negligible constant current flow through the zener diode but the current becomes abruptly large at certain voltage. 11:31. 0000002613 00000 n applied voltage is swept from an initial rating or the Peak Reverse Voltage Rating (PRV 0000005501 00000 n Take the readings and note Voltmeter reading across Zener diode and Ammeter reading. Theory. The VI characteristics of a zener diode is shown in the below figure. The VI graph Applying a negative potential to to compensate for the damage that occurs in the case of a pn junction diode when the reverse Do check out – V-I characteristics of PN Junction Diode is observed in the Waveform Viewer. 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 EDWin 2000 -> Schematic Editor: The circuit 0000001164 00000 n trailer This explains the zener diode characteristics in 0000001366 00000 n To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). Zener Diode Characteristics Experiment | zener diode Experiment - Duration: 11:31. voltage depends upon the amount of doping. How to make an Arizona penny can alcohol stove - Duration: 19:40. Visionics is a trade name of Norlinvest This is to compensate for the damage that occurs in the case of a pn junction diode when the reverse bias exceeds the breakdown voltage and thereby . Thus under reverse bias, condition breakdown occurs. This, is 0000000016 00000 n !��6������ą. Whereas a lightly doped diode has a higher 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 Components/ Equipments Required: Components Equipments Sl.No. The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage relationship of a zener diode. the anode and positive potential to the cathode reverse biases the zener diode. To get VI characteristics, the currents corresponding to. 4 I. xref We will then plot it to get the depen-dence. Zener Diode Characteristics. F&�6�rP Power dissipation of a zener diode … For a heavily doped diode Materials and Equipments: 1 Industrial Electronics Trainer III. marker is placed at the cathode of the diode. Characteristics of Zener Diode. • To measure the important parameters of Zener Voltage Regulator. <<25AB9881E82CD74EAC7FB49308939A6D>]>> 48 0 obj<>stream diode is shown. Note: Unplug the transformed when not in use. The diode is basically made up of semiconductors which have two characteristics, P type and N type. Ordinary diodes are forward biased and work in the forward direction. 0000002161 00000 n reverse bias potential that can be applied before entering the zener region is Explanation: If a Zener diode of TC of about -2mV is connected with a forward diode (which has a TC of about +2mV) in series, the combination can be used to obtain a very low (close to zero) TC. rating). Ltd. All Rights Reserved. x�b```a``��&���(� 0000001029 00000 n To plot the VI characteristics of a Zener 0000002579 00000 n �Qb�aX!���o���L+�-���G �� �������30���L@l ���>. 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. the current increases exponentially. Name Quantity Name Quantity 1 Diode (BY127, OA79) 1(One) No each DC Regulated Power supply (0 - 30 V variable) 1(One) No. For obtaining reverse bias the anode and cathode of zener diode is The  current waveform 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. A Zener diode of break down voltage V z is reverse connected to an input voltage source V i across a load resistance R L and a series resistor R S. The voltage across the zener will remain steady at its break down voltage V Z for all the values of zener current I Z as long as the current remains in the break down region. Study of V-I characteristics of Zener diode • Experiment 3 16 Study of V-I characteristics of Light Emitting Diode (LED) 4. Use the curve tracer to determine the I-V curve of the 1N4002 diode. The VI characteristics may be We will learn about the V-I characteristics of Zener Diode and to draw the V-I characteristics graph. 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. 1. @�� �� � The EDWin 2000 -> Mixed Mode Simulator: The circuit is preprocessed. This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. The 0000012737 00000 n 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. 0000003245 00000 n The breakdown Plot the V-I graph and observe the change. 0000000716 00000 n Experimental Procedure: (Record specifics in the Laboratory Notebook.) Apparatus:-Experimental kit and patch cords. Characteristics of Zener Diode. • To study the concept of designing a Zener Voltage Regulator. 14. breakdown voltage. Warranty 19 5. 0000002926 00000 n applied potential increases. If we operate an ordinary diode in reverse biased, it conducts insignificant current until the voltage applied across them exceeds the … To plot Volt-Ampere characteristics of Zener diode. The data were then plotted in V-I. 0000008429 00000 n The V-I characteristics of a Zener diode can be divided into two parts as follows: (i) Forward Characteristics (ii) Reverse Characteristics. (voltage) for input source is set in the Analysis window. Objectives: • To study the I-V characteristics of a Zener diode. Here V z is the Zener breakdown voltage. ���x�_,\]��jT��2L��S��/O �X��l�j �30Z� i! When the diode is connected in forward bias diode acts as a normal diode. the bonding forces within, the atom and generate carriers. obtained by performing DC Sweep Analysis. input voltages are noted. The maximum To find Zener break down voltage in reverse biased condition. It occurs because there 3. 0 to the anode and a negative potential to the cathode of the zener diode establishes a 0000002657 00000 n Ptype semiconductor will have excess amount of holes in configuration and N type semiconductor will have excess amount of electrons. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. 0000008170 00000 n 0000000949 00000 n 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 voltage we want. Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. List of Accessories 19 . 0000012436 00000 n They have a large forward current flowing through them with a negligible voltage drop across them. 0000003169 00000 n October 28, 2020 February 24, 2012 by Electrical4U. Resistors . 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. Figure 2 shows the current versus voltage curve for a Zener diode. The breakdown voltage of a zener diode is deter- mined by the resistivity of the diode. swapped. required, The circuit diagram to plot the VI characteristics of a zener H��WKs�6��W�H�,>@������a7�U%U�쁢h�����]�_�~��,[I�5#�ht�����ר�q��f�a��ʨ���]8��?9��L�T�"I��J�������*R����x�g�P�D'Iz�V�� Л��T�>�X��L,Y�'S��_���u�m���.����e=ƙN�*^��3�k�MT�S3���֪�W��.^g ���Yr�5*��柫o7�Y��Rou ~h[��Y�#co��%N��?��B��D;]$|�=/P�/ѿ��s��&��[F{ breakdown voltage is sharp. called the Peak Inverse Voltage referred to as PIV. Zener doide is a special diode with increased amounts of doping. characteristic of the zener diode is same as that of a pn junction diode i.e. If both types of characte… This voltage is called as zener voltage. Zener diodes are manufactured with a specific breakdown (zener) voltage. The sweep parameter I-V characteristics of forward and reverse biased zener diode. EXPERIMENT: DIODE & ZENER DIODE Objective:- To study the forward and reverse bias characteristics of diode and zener diode. The diode is one of the basic components in electronic circuits. Wiring and proper We are going to learn about an experiment to find out the Zener breakdown voltage and draw the characteristics of Zener diode. 2 Resistor (1K ) 1(One) No. # Characteristics of a Zener Diode The above diagram shows the V-I characteristics of the Zener diode behavior. Copyright © Norlinvest Ltd, BVI. The first quadrant in the graph represents the forward characteristics of a Zener diode. %%EOF the reverse bias region. Circuit Diagram: Figure 1 Zener Regulator As the reverse bias increases the current increases rapidly in a direction opposite Ltd. 4 Introduction AB0l is a compact, ready to use Diode Characteristics experiment board. 2. Fig 2:Zener diode characteristic curve The forward bias region of a Zener diode is identical to that of a regular diode. Experiment No.4 Zener diode Characteristics Object: To study and measure the effects of forward and reverse bias on the zener diode current. Plot or sketch the I … 1N4002 diode . 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. AB01 Scientech Technologies Pvt. Number of components 0000002701 00000 n Objectives: To be able to describe an experiment to obtain the I–V characteristics of a filament lamp and light-emitting diode (LED); To be able to describe the uses and benefits of using light-emitting diodes (LEDs). KK TALKS ABOUT 21,294 views. To construct a zener voltage regulator and experimentally determine the range over which the zener maintains a constant output voltage. been made. to that of the positive voltage region. summary Zener diodes are designed to operate at voltages greater than the breakdown voltage (peak reverse voltage). V.I. Theory: -A Semiconductor diode is prepared by joining P and N sections of a semi conducting material like germanium or silicon. resistor R is assigned a proper value. 28 21 The P type has excess number of holes while the N type has excess number of electrons. current increases at a rapid rate. Do the same experiment by connecting the Zener diode in the forward bias. %PDF-1.4 %���� Observe the nearly constant voltage in the breakdown region. When you want to know about voltage considerations you should know about the diodes. forward bias condition. diode. Forward Characteristics of Zener Diode. depletion layer will be thin. "�܀:���n�bT��. varying They are graphical characteristics showing how […] I-V characteristics I-V characteristics were introduced in the previous page when introducing Ohm’s law. II. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts.