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