?6dJ�,Z�K4YvɎ)I���o�$��-�h��.�++ҟR�q��g�B�ɭ�6���59�0���r9��%��7��ɦ(^L�o�(�%�/`%v�d�Vr=%���:�Hb�G /BitsPerComponent 8 Further increase in voltage does not increase this current. /ProcSet [ /PDF /Text ] >> endobj /Type /Page The current in the reverse bias is due to the flow of minority carriers. S#�F�s� �l �ط@X�H���_�R0��N�2��g�;2����2[3��I��"�pB����Cs��)*����cO-�v�N�MՎ���v�(!7��6Pd��pQYᳱ��h��'�{gJ�UY} ��Č�w���xK�.ò�okc`м 9V battery with wires, 3. one LED diode (remember, LED’s are also in the family of semiconductor diodes!) The above experiment could also be used to investigate the variation in resistance of a thermistor as the temperature changes, and the variation in resistance of a light-dependent resistor as the light level is altered. Diodes: Experiment Guide Components required for this lab: 1. Zener diode characteristics can be observed. The reverse current shows a … We use Zener diodes for voltage regulation and voltage stabilisation. The figure depicted under the section Forward Characteristic shows that Forward Voltage and Reverse Voltage are usually plotted on the horizontal line of the graph. /Type /XObject Components: Equipment: Name Range Items needed: 1. breadboard (GET Breadboard slidable Total number of pins 840 (L x W x H) 172.7), 2. This is because the resistance is very low in forward biased condition. The current flows through the diode from the anode to the cathode. Some of thecharacteristics that will be investigated are the I-V curve and the rectification properties. However, with further increase in reverse voltage, the current shows a … Application of diodes is broad. ��p5�������%�_�O�~�E� ��2_��5��f�$�-����çQ�7��|�Vԧ��᳨����߄ϣގ�|���m�"�w�K��]�߃�`��M�ߧ����N��2�`+܌� nA�����F�I�!�ꏨn�[Q��2O�]T�D�O����[�_�S� |�n�.�O�{���gT���H���c�K�@����w��G�~�A�Q�?D} ~�� lG}��섇�.�G���> The Zener diode mainly operates in reverse biased condition. The knee voltage of a diode is related to the barrier potential of the material used in the device. 3. 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type semiconductor material. Most of the diodes are made from silicon because it can afford high temperature, however, germanium is also used for manufacturing where low voltage drop is required. University. Forward Voltage represented to the right and Reverse Voltage to the left. Diode Characteristics PurposeThe purpose of this lab is to study the characteristics of the diode. Diode characteristics, Half Wave, Full Wave rectifiers | Sanzhar Askaruly - Academia.edu Diode is an electronic device having conductor at their ends. Diodes:An ideal diode is a device that allows current to flow in only one direction. The V-I characteristics of a diode can be forward or reverse. 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). Related documents. �8�� ���$DQ+!�ZE���@ $QSP�ZU�uP�y��R��T��6�g�Hu��P��Bu&4f��Є:��l���͙?�hAm�VԹT;`�u��vB;�I��A�E�ԅ0���PA'j��pR����P�B7�2X��z2���Ћ����� To find Zener break down voltage in reverse biased condition. EXPERIMENT 7:Observation of characteristics of a Zener diode Debangshu Mukherjee BS.c Physics,1st Year Chennai Mathematical Institute 7.11.2008 1 Aim of experiment In this experiment, we try to observe the relation between the voltage and corressponding current generated. It is the reverse saturation current. They are graphical characteristics showing how […] Circuit Theory (EE112) Uploaded by. %���� x���y�]gu/��y8��=�%a�F+vb&.�A�rU�"�}����A�@CyP��JA�.�[!׏ 1k resistor (x 1) 3. Lab IV: Silicon Diode Characteristics – Page 1 LAB IV. The data were then plotted in V-I. >> �2��հ��� ,E=�e^�Sa9�iTa��D=Ve^�3���ըgB?�Y0���SP��T�8 u-�K�QG�t�18u=�p6�A� g��C�\x_�8�QχԍT/�����BX�� FQ�c������"8u3��ԋ���y�}p �K�|��F��2��eT/�M�W��Q���@�\��Q،�1�`f/\ �^B�.A�8��.E���8�k��n�.G��@�$�O���o����ࣨ���Y��pe�7�9� The junction voltage vs. current characteristic of an LED is similar to the V-I characteristics of diodes. Because you will do it by yourself, you will better remember this lesson. 1M resistor (x 1) 4. 2019/2020. 1 0 obj << The Zener diode characteristics will also be studied at. … To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). This voltage is known as the threshold voltage or Knee voltage. (1). ����ҧ Connect the CRO CH1 across the input and CH2 across resistor. Share. 10M resistor (x 1) I. Diodes Overview Diodes are mostly used in practice for emitting light (as Light Emitting Diodes, LEDs) or controlling voltages in various circuits. October 28, 2020 July 24, 2018 by Electrical4U. /MediaBox [0 0 595.276 841.89] DZ���!�����x�ذ���,�]:yŔ�ή4��S�J�D�B�4WZ��C���͹�:�8 �J����C�u"�ω&�� h)T�>Q�~��.�7Y")*��IK��5�e8���5Bj�zC To get breakdown voltage sharp and distinct doping is controlled and the surface … A PN Junction Diode is one of the simplest semiconductor devices around, and which has the characteristic of passing current in only one direction only. /Subtype /Image endstream SILICON DIODE CHARACTERISTICS 1. However, there is one major difference. stream EQUIPMENT … Ȩv�PP��o��np�z���E�;����/j�j|��A�a��V@UE�+D!�� 3. Ans: A diode is a two-terminal electronic component with asymmetric transfer characteristic, with low (ideally zero) resistance to current in one direction, and high (ideally infinite) resistance in the other. 2 0 obj << VK�)�!�����PWJ�:U(�q��(�B� �u��ܩ�n��`0�^q�ˏp̟r�`! Semiconductor Diode Characteristics. I-V characteristics I-V characteristics were introduced in the previous page when introducing Ohm’s law. /Contents 4 0 R Diode characteristics & Design of Rectifier circuits. VOLTAGE-CURRENT CHARACTERISTICS OF A … OBJECTIVE In this lab you will measure the I-V characteristics of the rectifier and Zener diodes, in both forward and reverse-bias mode, as well as learn what mechanisms cause current flow in each region of diode operation. /Parent 17 0 R c They provide a low-cost and no frill method for voltage regulation. Physics Practical Experiment | Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail | Posted On : 27.03.2019 03:36 pm . xڅVɒ�6��W�VY�͖�I�$�De'� Q�HE*\��~�z���꧟u�Щot�Xm:�}��E�~�Xm�V�zK�>����x�+~��eh�����j���z�Q6��mX���j�P:���|��Y���s?N�bi��댌�ITi;[�C��"�~� T-|�R��v��[��C��N�Р8&wL�G�D�Pk�t�ֶ١��3�A,��S�/�t,�e�O�~1��?��%?е��*�w�p3Qy�`;� `��Dr?����k[��#�E\�not���j����C5�xƐ ,Ih@w�9&�p��  �3`����X���Ip�� ����6��F�{0�F.XB�����ػ���/t��A�F cC�?y� �T �~$jhy�I�t Measurement of Diode I-V Characteristics An oscilloscope display of the diode I-V characteristic can be Figure 2 – Current/voltage characteristics of an ideal diode. To determine static resistance. Observations: Table: 1 Forward Bias Condition: RPS Voltage Vs(volts) Forward Voltage across the diode … VB IS I V VT. University of Florida EEL 3111 — Summer 2011 Drs. Name Quantity Name Quantity 1 Diode (BY127, OA79) 1(One) No each DC Regulated Power supply (0 - 30 V variable) 1(One) No. /Font << /F16 7 0 R /F17 10 0 R /F27 13 0 R /F15 16 0 R >> ����]�WvL�)�F,�O�ص��`��JX�L�)"���?�`$7�v�d����j2[E�j�*b�3Mԗ�f�“�k�`,���J�2h����e����U,��RGMޟr�jLya�m2.�E�r�PZ���r���`0F�W���O)�~6%�`��P�Ȝ��Ţ�M�(�"EAEZ@������"��Ž�?#� /Filter /FlateDecode %PDF-1.4 2 Resistor (1K ) 1(One) … 1N4148 diode (x 1) 2. /Length 1321 For example, the current typically goes down, not up, as the temperature decreases. 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The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. Academic year. &sփB�O�[ �h#�9��= E�r,G.�8J�rd���`0F���r���)� 侈����m�`�x��(m6�^���"�o� ����"��žͫ/�Od��1%���O���`��pr��E�( >> endobj �Fh�އ���O�*�� d�U�N�2��[�i�����b�U�x���ئFÕ�l`1�C �Zf�to������ Z!��T�k��t��Ѣ?�.���0��a.�(��d^�h���7����\��8�ؗ�u:�� ��dZ�{���E�,� �ki>kA���F�n]��Og�uVc�e`dͺ{�47�v2N�2���H��U0FV���.=������TNƺw,U����x+�砕��&0�Q �AZ����(yt ���EtY���\�Pa����F7CW���:�J�i^ٌ"�VD��TW��1��������3�N���g�>�&`A�PA��$�P�Tm`E�Q� 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. To plot Volt-Ampere characteristics of Zener diode. 3 0 obj << ��B�/QvWR�ԡ�o�m� �0�pu�Q�," �;=勾�װ[OSAS���Щ�Fx�j�y�����g�� The critical parameter of this type of diodes is the Zener breakdown voltage. ��y��F}�*�� �;�0< ?E�E�)�9�����C�k����A�-�u7ܓy����{�>�g�~�gaG��G�9x �yx��/�Ù�v��L�x,s?�G}~��{��'P_�'Q�v���B���F}��_�7���3��_a�ߨ�����d�P�'�C}�C���_2�~���W�M�����M�����M����Ԧ�6}?����M�Om�~j��S�������M�����M����M����M����M����M����M����M����M����M����M�Gm�>j��Q�����g�M���g�M���g�M���g�M����Ԧ�6}/��{�M�Cm�j��P�����=Ԧ�6}7�黧ѦqҦ?�ɦ�6}�黨M�Em�.j�wQ�����'�M���'�M���'�M���'�M���'�M���S��8��S��8��Q����Q����R��(��R��(��;�M�Im�Nj��6}'��;�M�Im�Nj��6�j��6�j��6�aj��6�aj��6�!j��6�!j��6�Aj��6�Aj��6}��;�M�Am�j�wP�����Ԧ? ��S�zE��&0�Q��ٞ�S��Dn��ݔ��8��*Xy^ȍ��� �^��?������G�� ���6��Ǭ���L&�b0���h �YE�"H��,YdI��(��H�%�O�ւ7y�mo2���jnX�P�wˏk$�?�BN���S�yaCnkk6��?E�r�PZ��=6�M`0� YJ�\42�qB֋BF�LO_��b� 6LYx��B�)��B /Length 18222 stream 9gX�P�0�6r[��{fq�aCi;8_�t7��`0�d�8�墱\�ٔ��rY]�h���rYE�f�� �$�U��;^���Ž[�ܣ�\ �OkmF����À�S. x�uVKo�F��W�H�z��ȥM (��C�-�2J�I�j�}籔)[� qvg8�of�R ?�j)��>��.�t�O�g�g.���s����ڔ���z��O}�%I�$�K��3_(�s���*�*)���!UƊ»�:+d�n�o���ʍ1���RY������.�j�����jd��b*۵@�H� ��w��u$؁\5��a|�W���F}��o��?�o�W�.��f�����~�ӈ��~l>���r����2R��:���.RQ The measured data shows that, for currents of order 10mA and above, the exponential model for the LED must be modified to include a series resistance of order 5W. ]m#-tᣡ���]�R:��|E�.�e�z�{�h�a_u�x�B�ʝXB�I0G������Z���O���Έ�n��Ye����k~�� ��̮=�ӫ��d�X������� /DecodeParms << /Colors 3 /Columns 258 /BitsPerComponent 8 /Predictor 10 >> Course. 20 0 obj << To determine the V-I Characteristics of a p n junction diode. When the reverse bias voltage is greater than a predetermined voltage then the Zener breakdown voltage occurs. /ColorSpace /DeviceRGB I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. When forward biased, the positive end of the diode is called the anode, and the negative end is called the cathode. 22u capacitor (x 1) 5. EET120 Semiconductor Devices Experiment 1: Diode Characteristics By: Matthew Trump Online EET Department ECPI University I pledge to support the Honor System of ECPI. /Height 318 /Width 258 /Filter /FlateDecode /Resources 19 0 R >> endobj Forward and reverse current values are shown on the vertical axis of the graph. endobj In the beginning, by increasing the voltage the current change very slowly but when the voltage reaches 0.7V (for silicon) the current start to change rapidly for a small change. The first quadrant of the V-I characteristics curves shows the forward operation of the diode. The point of beginning or zero value is at the center of the graph. This experiment will allow you to visualize the principle of operation of a semiconductor diode, whether current conducts or not. EXPERIMENT NUMBER 4 Examining the Characteristics of Diodes . This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. The symbol of a diode, shown in Figure A-1, looks like an arrow that points in the direction of current flow. /Resources 2 0 R The forward current increases slowly in the beginning and shows a sudden rise at a certain value of forward voltage. 9 ��2)T�֕�R�jD�&l���2�|����9;`��2�ڞ�:n��N�M�_�w)=`�{ h���Ŕ7T��c�Å����l���_;��|��5�b?�*nAS Give the input as triangular voltage waveform from Function Generator (both positive and negative peaks). /MediaBox [0 0 595.276 841.89] However, unlike a resistor, a diode does not behave linearly with respect to the applied voltage as the diode has an exponential current-voltage ( I-V ) relationship and therefore we can not described its operation by simply using an equation such as … chung chinngee. Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. The graph showing the forward bias voltage and forward current is known as the forward characteristics, and that showing the reverse bias voltage and reverse current is known as the reverse characteristics. In general, the cathode of a diode is marked by a solid line on the diode.The �o����b?b�f���,2o$!Tg�*t�6�+�Y�s�޼�PB�*]K5 A�aɃ�3��|]% %-B2��R��cW�0-hK��O+B�kU��J�iE6�Dm�v"��/HaSH�����YT�\Q��Ra���D �~���P̭i_m�y�pf�ވ�Yzekl��229��L�,Q�Ä4Y,� R������Z:�x �4����=�J��e helpful 4 1. The forward and reverse current voltage (IV) characteristics of a diode are generally compared on a single characteristic curve. /Contents 21 0 R jK�����z�;�D�۱����L |�s���J>�( 2�2���/{8 �/Uˎ�Z>��bl��(xq��?���~V�j��6�ؓI�����Pz�h�(�-;Ī��E,�#"����P}t����s�];�J��͑9?xŸ�#cN�~8@� #���`�߱�ȏ͛���X_�� 1�J�M��$�F90uͮ���S��12�����]�B��n�TĬ�&��6�m��ѰE�±˴�L:�*7�z��@@� �9n!\�k����g�K! The forward current increases slowly in the beginning and shows a sudden rise at … /Type /Page /Filter /FlateDecode CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. # Characteristics of a Zener Diode The above diagram shows the V-I characteristics of the Zener diode behavior. The principle behind the diode is similar to a valve or a gate, which lets electricity flow only in one direction (Simple English Wikipedia, Diode). This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. The Zener breakdown voltage is the … I t is noted that at a certain reverse voltage, the reverse current reaches its maximum level. stream Q.2 What do you understand by P-N Junction diode? Zener Diode Experiment. Full Wave Rectifier Name: Sanzhar Askaruly ID: 201100549 Date: 17/09/2014 Introduction Diode is an electronic device having conductor at their ends. �����*��b�`�l4���l��f�p1�����+��3�� fIkmF�a X�?,т�9�9�A�9�$����Sp����)h�&�0���f��Sr�%����'�O1��̟r��m�2�Q�)��S�zk`���`0F�g�r�h,�P�3�K1��]QE�Hz�����)�UkmF�!G$�F �F���ī��3�ӌM�XD���F�(XEQ /�� 3�ԗA�O+g�D�&�L���)y�f�� Diode Characteristics Physics Kids Projects, Physics Science Fair Project, Pyhsical Science, Astrology, Planets Solar Experiments for Kids and also Organics Physics Science ideas for CBSE, ICSE, GCSE, Middleschool, Elementary School … Comments. The cathode is marked on a real diode by a band. Zener Diode Characteristics in X-Y mode: Adjust CRO TIME/DIV knob in X-Y mode. S�`G���� k�Vg�������m�%a��R��~t�>g�����Zߚגʲƥ ����`6`0� f�ـ�`6`0� f�ـ�`6`0� f�ـ�`6`0� f�ـ�`6`0� f�ـ�`6`0� f�ـ�`6`0� f�ـ�`6`0� ���y��j2.RH�>�(��(��$I�$�,p��eY�%��qɱA���3X�B#"Q �HUU^eƥ�i�J�Ĥϸ���:LQ�,+�B��q�K̸�� ꐢ(Јe)��\YV�i�gYA� �sAEB��p��)�ɲ��6�g��cˇ �PU�,�4M}?�tZAٶ)��_������=�y/zыLSO�l4�%Ij4��E!إ�6����O���/B�y����(l��oi��I 8IE�tZB�6������������Gǩ���f��p�=.I�m�5�=�yϾ}�|�ϲLQ�4�I}� �2p��id c7�=!Ŀ��~�{�����w��[o����n{�[ߚ�e��\y��y^Z��K�6X����j�I�,�xY�7����. 2. 4 0 obj << When the diode is connected in forward bias diode acts as a normal diode. LIGHT EMITTING DIODE CHARACTERISTICS (SAMPLE LAB WRITEUP) John A. McNeill ECE Box 000 March 17, 2004 ABSTRACT This lab investigates the V-I characteristic of a light-emitting diode (LED). Voltage-Current Characteristics of a PN Junction Diode . (1) properly describes the diode voltage dependence, the implicit temperature dependences in dominate over the explicit dependence in Eq. :���`��2�Oq(`6[$��q�i�%3�lh��b2YL�ED����ex��ܽ���8�� �35ǣ� ń^�p� ��4.�=��%h����H�?���D�: a���û��������9Ls��lKz���\)��f4�5ܶG��F��l���Lu|�l��c�9�3{d��1x��6�u��?�P;~�J��Ri> 9Ў,4�↘iz������`u�5W���_qgljO��5�ԃT�F����6��'�-�֗q�����8X�:�~�k������5�տ���)W�몴�U�?0��}��dz*Pԃ(����9��4eds�2]��S3���TO#�� �u�vj;������\:��G[z��^j&vh���7��]R��GGS�TC9�밬5���Z���� �5��0HA��C����:�����>,�����S��ލq�yS�khB��tu��(����M8�+���O�����ۮ�T�(ҋ��)&��yb�|��'�1����n�dҠ� 3x���RcsE�����O��0�B�^���ڕ��G G^gt�9n��xLT�-n0����V��ES�[���Ⱥ0r��#�#�?h|��G�cr�O,L��RI�� �+�q�&���l�D¬�f���"2��S=M�@�gZ�ppu���u-2� you tube channel - hari cvm AIM 1. For the reverse characteristics of the given p-n junction diode, a graph is plotted with reverse voltage along X axis and reverse current along Y axis. [��R��N�4���y��N�t��3zܺ���[�=5�r԰��" �€sS�"s���'="Uء|����(�Ix�ŝk\g�w���hIn �I��'z@����GR��vO� To draw the voltage-current (V- I) characteristics of the PN junction diode and to determine its knee voltage and forward resistance. This diode either made by silicon or germanium which has atomic number Z=14 or Z=32 respectively. Figure 3 – Current/voltage (I-V) characteristics of a non-ideal diode. endobj The forward characteristics of a diode is non linear. UCSI University. The forward characteristics of a diode is non linear. /Length 1178 fI���x�'ٓ�b&�S�hh�JhnX�^Vxk���S�W~’��̟B��\�q��%�t7��`0�0 Characteristics of the Diode Lesson 2. >> Please sign in or register to post comments. � _j��?^ӣ�S. The center of the diode voltage dependence, the implicit temperature dependences in dominate over explicit... At the center of the V-I characteristics of the diode slowly in device... 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