Lab manual of zener diode

A transformer 2. A resistive load 3. A diode FIG A high AC voltage is applied to the primary side of the step-down transformer and a low voltage will be obtained at the secondary winding which will be applied to the diode. During the positive half cycle of the AC voltage, the diode is forward biased and the current flows through the diode. LAB MANUAL EXP#3 ELECTRONIC DEVICES AND CIRCUITS PROCEDURE: (i) FORWARD BIAS (For ‘Zener’ Diode): www.doorway.rutions are made as per the circuit diagram. www.doorway.ru forward bias, the RPS +ve is connected to the anode of the diode and RPS –ve is connected to the cathode of the diode, www.doorway.ru Regulated power supply voltage is increased in steps. LAB MANUAL ELECTRICAL ENGINEERING MATERIALS SEMICONDUCTOR DEVICES LAB (ECF) III SEMESTER ECS To study zener diode as voltage regulator. 14 To study and draw the characteristics of FET in common drain configuration. 15 To study VMOS Technology.

A Zener Diode is constructed for operation in the reverse breakdown www.doorway.ru relation between I-V is almost linear in this case V z = V z0 +I zr z, where r z is the dynamic resistance of the zener at the operating point.V z0 is the voltage at which the straight-line approximation of the I-V characteristic intersects the horizontal axis. LAB MANUAL EXP#3 ELECTRONIC DEVICES AND CIRCUITS PROCEDURE: (i) FORWARD BIAS (For ‘Zener’ Diode): www.doorway.rutions are made as per the circuit diagram. www.doorway.ru forward bias, the RPS +ve is connected to the anode of the diode and RPS –ve is connected to the cathode of the diode, www.doorway.ru Regulated power supply voltage is increased in steps. the Zener diode is close to constant over a wide range of currents thus making it useful as a shunt voltage regulator. The purpose of a voltage regulator is to maintain a constant voltage across a load regardless of variations in the applied input voltage and variations in the load current. A typical Zener diode shunt regulator is shown in Figure 3.

Experiment no 1. Aim. To construct a zener diode voltage regulator. Apparatus. Zener diode, resistor, variable DC power supply, milliammeter, voltmeter. To plot the V-I characteristics of ZENER diode under forward and reverse bias conditions. 2. To find ZENER voltage, forward bias resistance reverse bias. Perform the experiment on bread board and the trainer kit and plot the graph of V-I Components and equipments required: Zener diode, multimeter.