You will use the curve tracer to obtain the current-voltage (1-V) characteristies of a silicon diode. To find load regulation characteristics of Zener voltage regulator Apparatus: S.no Apparatus Range Quantity 1 Zener diode 1 2 Resistance 470-ohm 1 3 Regulated power supply 0-30V 1 4 Ammeter 0-100 mA 1 5 Voltmeter 0-10 V 1 6 Breadboard and wires 7 Variable resistor ( 100-1100-ohm) Introduction: An ideal P-N Junction diode does not conduct in reverse biased condition. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts. Zener Diode Makes For A Lousy Regulator Bald Engineer. Connect voltmeter and ammeter in correct polarities as shown in the circuit diagram. To get breakdown voltage sharp and distinct doping is controlled and the surface … When the positive polarity is at the anode – the diode is forward biased and is conducting. C. Half Wave Rectifier Build the rectifier circuit shown in Figure 4. The circuit symbol of Zener diode is as shown in the figure. 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. We use Zener diodes for voltage regulation and voltage stabilisation. Zener Diode Characteristics - Zener regulator Prelab: You are tasked to determine experimentally the characteristic curve of a reverse-biased Zener diode. We are going to take Zener I-V Characteristics Curve experiment as an example to understand how we can perform a general experiment using the PSLab device. Electrolytic capacitors An electrolytic capacitor is a type of capacitor that uses an electrolyte, an ionic conducting liquid, as one of its plates, to achieve a larger capacitance per unit volume than other types. 7-9 4. 18 ZENER DIODE Experiment No. For V s between 0 to 20V, obtain values for I z and V z. Plot the reverse characteristic curve by taking reverse voltage along –ve X-axis and reverse current along –ve Y-axis. The critical parameter of this type of diodes is the Zener breakdown voltage. (Note: All or any pre-lab works must be completed before coming to the lab and must be handed-in to the lab instructor during entering the lab and at the beginning of lab session) Procedure Zener diode I-V characteristics 1. Chapter 2 Zener Diode Zener Diodes The Breakdown. Use AWG1 (5 V constant) and the –5 V Vn user supply to establish the dc supply V IN. 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. To plot Volt-Ampere characteristics of Zener diode. Then we will see how that experiment can be performed using the PSLab Android App and the PSLab Hardware Device. In this way, it is used as a voltage regulator. 3.1 Diode Characteristics Small-Signal Diodes Diode: a semiconductor device, which conduct the current in one direction only. The above diagram shows the V-I characteristics of the Zener diode. 1-3 2. #24 wire ... You will mostly use electrolytic and ceramic capacitors for your experiments. When the diode is connected in forward bias diode acts as a normal diode. While doing the experiment do not exceed the readings of the diode. To measure the reverse breakdown voltage of your Zener diode we need to produce a voltage difference larger than the breakdown voltage of the 6.2 V 1N4735 diode. EXPERIMENT NUMBER 4 Examining the Characteristics of Diodes . INTERPRETATION OF RESULTS This experiment demonstrates the characteristics of a zener diode. 10-1 2 Zener Diode V-I Characteristics. Preface: ... Another use of diodes, especially zener diodes, is as a limiter. 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. Build the circuit shown in Figure 1 on your solderless breadboard using the 1N4735 6.2 V Zener diode. Electronic & semiconductor devices Page 5 of 7 INTERNATIONAL UNIVERSITY SCHOOL OF ELECTRONICS & TELECOMMUNICATIONS ENGINEERING (EE) 1. Zener Diode Definition Vi Characteristics And Breakdown. Conventional Zener Diode With Rz 30 W Shows A 1st I V. Why … To find Zener break down voltage in reverse biased condition. Procedure: Step 1. • Never use larger wire as jumpers. Hence in this way the voltage is limited across the load. The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage relationship of a zener diode. • To study the concept of designing a Zener Voltage Regulator. Pn Junction Diode Characteristics Experiment Using Breadboard March 30, 2019 Get link; Facebook; Twitter; Pinterest; Email To Study the working of a diode as Bri dge rectifier with and without filter. The VI characteristics of a zener diode is shown in the below figure. # Characteristics of a Zener Diode The above diagram shows the V-I characteristics of the Zener diode behavior. The ADALM1000 hardware can only produce (and measure) voltages up to the 5 V maximum. characteristic graph of the zener diode used in this experiment. Use various fixed and variable resistors for R L. Figure 1. Figure 2. To Study the V-I characteristics of Forwa rd Biased PN junction diode. base unit, oscilloscope and a dc supply we can demonstrate the characteristics of the zener and its application for voltage regulation. What Is Zener Diode Operation Principle Types Uses Of . On the first objective of the experiment, the group demonstrated the dc characteristics of the Zener Diode with the use of a breadboard. Connect the circuit in Figure 1.2. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. Result: Volt-Ampere Characteristics of P-N Diode are studied. For convenience it is used normally. Zener Diode Characteristics. Materials and Equipments: 1 Industrial Electronics Trainer III. • To measure the important parameters of Zener Voltage Regulator. Objectives: • To study the I-V characteristics of a Zener diode. David started the tutorial comparing between zener and regular diode. When forward biased voltage is applied to the zener diode, it works like a normal diode. 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.we can connect it for different applications. Figure 4 shows a case in which reverse-bias breakdown of zener diodes limit the voltage swing across the load resistor. At the end of the experiment, the student will be able to Explain the function of a Zener diode; Explain Zener Diode as Voltage Regulator; Zener Diode. What we are trying to achieve in this experiment is to demonstrate that a diode exhibits a behaviour as described by Figure 4. 4.1). The setup we are using for this experiment. We can add an external negative voltage source to combine with the positive internal voltage to produce a total voltage high enough for this experiment. Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. To calculate static and dynamic resistances of the Zener diode in both forward and reverse biased conditions (before, after break down voltages). In general, the cathode of a diode is marked by a solid line on the diode (Fig. This experiment is composed into 2 objectives. What Is A Zener Diode Definition Construction Working. Here we go with the Zener Diode Characteristics Experiment Using Multisim Software A number of ready to use experiment circuit boards are provided. To Study the working of a diode as half w ave rectifier with and without filter. The break down voltage Vz is obtained from the graph as shown below. This is considered as the basic application of Zener diode. Using both charts, plot the complete IV terminal characteristics for the Zener diode. The Zener diode mainly operates in reverse biased condition. When the positive polarity is at the cathode – the diode is reversed biased and is not conducting. Zener diode regulator. By using a breadboard, Zener diode, a diode, resistors, a digital multimeter, F.A.C.E.T. You will need to wire this on your breadboard. Experiments: Silicon, Zener, LED Diode Characteristics; Common Base NPN and PNP Transistor Characteristics First, we will look at the general laboratory experiment and it’s format. However, when reverse biased voltage is applied to the zener diode, it works in different manner. Two terminals: anode and cathode. Zener Diode characteristics: VI characteristics of Zener Diode. The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse … Zener diode regulator breadboard circuit. Laboratory Exercise 2 Diode Characteristics PURPOSE The purpose of this experiment is to acquaint you with the operation of diodes. This may lead to damaging of the diode. David Jones made a tutorial on the fundamentals of zener diodes over his EEVblog youtube channel. To Study the Reverse characteristics of Zener diode. 3. 2. 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 Do not switch ON the power supply unless you have checked the circuit connections as per the circuit diagram. The unit is supplied with a breadboard to help students experiment with test circuity using various components without having to solder. II. Circuit Diagram: Figure 1 Zener Regulator Zener diode is connected in reverse bias, so once the Zener voltage exceeds then the current flows through the diode but there is an unnoticeable voltage drop. 2. 4 I. When the reverse bias voltage is greater than a predetermined voltage then the Zener breakdown voltage occurs. Sl No Name of Experiment Page No 1. Experiment 4 Characteristics of a Silicon Diode and the Zener Diode Introduction The diode is a device formed from a junction of n-type and p-type semiconductor material. By connecting the negative terminal of the battery to the diode anode terminal, zener diode starts operating in the reverse bias or breakdown mode. Understand Zener Diode Datasheet Specifications. The experiment is continued till the milliammeter shows a large deflection while the voltmeter reading remains a constant, indicating the break down voltage. The forward bias region of a Zener diode is identical to that of a regular diode. 4-6 3. A single zener diode would limit the swing in one direction only. With these, the group was able to observe how a Zener Diode acts like a rectifier diode when it is forward bias and a voltage regulator when it is in reverse bias. The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. 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