zener diode characteristics experiment

Zener diode characteristics 1 Experiment #5 Object To study and measure the effects of forward and reverse bias on the Zener diode current. This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. References: • EE 121 Handouts The reverse-bias current created by breakdown mechanism is limited only by the external, circuit. Apparatus used: Zener diode, voltmeter (0-2volt), voltmeter (0-30 volt), mili-ammeter, micro- ammeter, variable source (0-2 volt and 0-30 volt). 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. Theory: Zener Diode: Zener diode is a heavily doped PN junction diode. Reverse Characteristics. 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. The current-voltage characteristic curve of the Zener diode is shown below. To draw the characteristic curve of a zener diode and to determine its reverse break down voltage. The forward characteristics of a Zener diode is shown in figure. EXPERIMENT NUMBER 4 ... characteristics of diodes and the use of diodes in rectifier and limiter circuits. 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. Figure 2 shows the current versus voltage curve for a Zener diode. 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. Procedure . Zener diode has the property of behaving like a dc battery in ‘on’ state (i.e. Fig 2:Zener diode characteristic curve The forward bias region of a Zener diode is identical to that of a regular diode. Do the same experiment by connecting the Zener diode in the forward bias. 2. 2. This voltage is generally avoided in standard diodes, but Zener diodes are designed and manufactured to have a very specific reverse breakdown voltage. Do check out – V-I characteristics of PN Junction Diode This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. Find Zener Breakdown Voltage in Reverse Biased conditions. 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. To draw the characteristic curve of a Zener diode and to determine its reverse breakdown voltage. The electric field may become large enough that covalent bonds are broken and electron-hole pairs are created. Zener diodes can be tested for opens, shorts, or leakage with an ohmmeter. Zener diode voltage regulator. But due to higher doping concentration, higher current flows through the Zener diode.In the third quadrant, the magic happens. 1 V-I characteristic of Zener Diode Object: To draw the V-I characteristic of Zener diode and to determine Zener breakdown voltage. To find Zener break down voltage in reverse biased condition. 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. 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. To study the characteristics of Zener diode. Variable minimum supply voltage should be larger than, desired output voltage for the diode to operate in proper operation. Reference . –A™Ì{K«aiX¹E[v‡ßÚ_ÜB‚ì߁ ’Ì §P!‰. 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. 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. 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. (Zener Diode V-I Characteristics) When the applied voltage exceeds an specific amount Zener breakdown takes place. For this circuit we can write the. As the breakdown voltage is appr… 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. Zener diode regulators provide a constant output voltage despite changes in the input voltage or output current. Only minority carriers cause small leakage current at reverse voltage. Theory:-A Semiconductor diode is prepared by joining P and N sections of a semi conducting material like germanium or silicon. In general, the cathode of a diode is marked by a solid line on the diode.The When a reverse-bias voltage is applied to a pn junction, the electric field in the space-charge, region is increases. Normally this circuit used when a constant reference voltage is needed. First identify the terminals of Zener diode, there will be a black colored circular band on one side of the Zener diode. 3. 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). 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. - Determining the quiescent point Q(VZ,IZ) - Determining the differential resistance of a Zener diode. The symbol of zener diode is similar to the normal p-n junction diode, but with bend edges on the vertical bar. Zener Diode I-V Characteristics Curve. Due to heavily doped, its 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. To study the voltage regulation in Zener diode regulation circuit. In our previous articles, we explain in detail about diodes, PN junction diode, semiconductors etc. To see the circuit diagram, click on the 'Show/hide circuit diagram' check box seen inside the simulator window. To study the voltage regulation in Zener diode regulation circuit. 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.. This phenomenon is called, . 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 layer at the junction of ‘P’ type and ‘N’ type. We are going to learn about an experiment to find out the Zener breakdown voltage and draw the characteristics of Zener diode. As we increase the reverse voltage, initially a small reverse saturation current Io. Which is in A, will follow. Apparatus:-Experimental kit and patch cords. 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. EXPERIMENT: DIODE & ZENER DIODE Objective:- To study the forward and reverse bias characteristics of diode and zener diode. For part B, Value for current across R (I. calculated by using the equation below to find the experiment regulation. The circuit for studying the forward bias characteristics of a Zener diode is as shown in the figure1. The list of the componentsof equipment required to perform this experiment mainly include Zener diode, Milliammeter, Voltmeter, and DC supply(variable), and Resistors 1. The Zener diode is a unique device which exploits a property of diodes that is generally avoided in standard diode applications. CMvG¾½^ùññ ²ºÌJ6”*Ú.g'C?¸„ií÷4ÔÎðjç;¼Z㐚t±‘ë5€ªc©Dô¬Œ‘fcà åË1:zÀ• ôaX£ŒEÏ2h);‡…(x1z-Ç.KÁüC¤Mݞ³Õ‚;ŽÝöãZ­¥FCUóV…˜, To construct a zener voltage regulator and experimentally determine the range over which the zener maintains a constant output voltage. Objectives: • Obtain the I-V curves of a signal diode and a zener diode • Compare the performance of different rectifier circuits . Course Hero is not sponsored or endorsed by any college or university. Brief Theory: When a reverse-bias voltage is applied to a pn junction, the electric field in the space-charge region is increases. To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . Theory . This preview shows page 1 - 3 out of 8 pages. 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. To plot Volt-Ampere characteristics of Zener diode. Typical diodes have a very high reverse breakdown voltage, the voltage at which the diode begins to conduct in the reverse direction. To determine whether a zener diode is regulat- ing at the proper voltage, a regulation test must be performed. Page 1 - 3 out of 8 pages will be a black colored circular band on one side the... 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