zener diode characteristics experiment

To see the circuit diagram, click on the 'Show/hide circuit diagram' check box seen inside the simulator window. 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…˜, EXPERIMENT: DIODE & ZENER DIODE Objective:- To study the forward and reverse bias characteristics of diode and zener diode. 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. Zener Diode Definition Zener Diode Working Zener Diode Circuit Symbol VI Characteristics of Zener Diode Zener Diode Applications FAQs. The circuit for studying the forward bias characteristics of a Zener diode is as shown in the figure1. 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. The reverse-bias current created by breakdown mechanism is limited only by the external, circuit. 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. In this article, we are going to explain Zener diode and its applications in detail. Reference . Zener diode regulators provide a constant output voltage despite changes in the input voltage or output current. To determine whether a zener diode is regulat- ing at the proper voltage, a regulation test must be performed. A Zener diode 2. 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 Ohm’s law given in the table and. Forward Characteristics of Zener Diode. 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. To draw the characteristic curve of a zener diode and to determine its reverse break down voltage. But due to higher doping concentration, higher current flows through the Zener diode.In the third quadrant, the magic happens. Do check out – V-I characteristics of PN Junction Diode The Zener diode is a unique device which exploits a property of diodes that is generally avoided in standard diode applications. This property of zener diode makes its use as a voltage regulator. 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. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. Here the Zener diode acts like an ordinary diode.When a forward voltage is applied, current flows through it. It is almost identical to the forward characteristics of a P-N junction diode. The forward characteristics of a Zener diode is shown in figure. Procedure . 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. A Zener diode not only allows current to flow from anode to cathode but also, in the reverse direction on reaching the Zener voltage. 2. This voltage is generally avoided in standard diodes, but Zener diodes are designed and manufactured to have a very specific reverse breakdown voltage. The circuit was constructed according to Figure- 02. 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. Objectives: To study the characteristics of Zener diode. Zener diode voltage regulator. Course Hero is not sponsored or endorsed by any college or university. Observe the nearly constant voltage in the breakdown region. Zener Diode I-V Characteristics Curve. 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. 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. The function of R in this circuit is to, safe value so that the diode does not overheat. Reverse Characteristics. In our previous articles, we explain in detail about diodes, PN junction diode, semiconductors etc. 3 Theory of experiment The diode is a device formed from a junction of n-type and p-type semiconductor material. 3. For part B, Value for current across R (I. calculated by using the equation below to find the experiment regulation. Apparatus:-Experimental kit and patch cords. Typical diodes have a very high reverse breakdown voltage, the voltage at which the diode begins to conduct in the reverse direction. Fig 2:Zener diode characteristic curve The forward bias region of a Zener diode is identical to that of a regular diode. Apparatus used: Zener diode, voltmeter (0-2volt), voltmeter (0-30 volt), mili-ammeter, micro- ammeter, variable source (0-2 volt and 0-30 volt). With your lab partner, brainstorm on the following ideas: On top of that, the transition into reverse breakdown is very sharp. As we increase the reverse voltage, initially a small reverse saturation current Io. To study the voltage regulation in Zener diode regulation circuit. 6. References: • EE 121 Handouts Assignment . To study the voltage regulation in Zener diode regulation circuit. Figure 1 shows the V-I char… Here V z is the Zener breakdown voltage. Zener diodes are used in application for, which a constant voltage in breakdown is desirable. In ‘on’ state , the voltage across zener diode remains constant until the voltage across it deops less than VZ . Feedback 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. This preview shows page 1 - 3 out of 8 pages. We are going to learn about an experiment to find out the Zener breakdown voltage and draw 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. 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. Due to heavily doped, its As the breakdown voltage is appr… –A™Ì{K«aiX¹E[v‡ßÚ_ÜB‚ì߁ ’Ì §P!‰. This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. 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. 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. First identify the terminals of Zener diode, there will be a black colored circular band on one side of the Zener diode. Zener Diode Characteristics - Zener regulator Prelab: You are tasked to determine experimentally the characteristic curve of a reverse-biased Zener diode. The electric field may become large enough that covalent bonds are broken and, electron-hole pairs are created. Once the values are found it should be plotted as characteristics curve. VI characteristics of zener diode. To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). 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