Eletronics Lab Report - Rectifier Circuit

EGR220

Than & Bhavin

Introduction and Objectives One of the most applications of diodes are rectifier circuits, which converts AC to DC. In fact, diodes rectifier forms the fundamental building block of the DC power supplies for electronic devices [1]. Therefore, in this lab, we were instructed to measure and analyze behavior of rectifier circuits, both halfwave and full wave (bridge) rectifier and peak rectifier. The primary objectives of this lab are: 1. To analyze and understand the nature of halfwave rectifier 2. To understand about the nature of bridge rectifier and peak rectifier 3. To be able to approximate ripple voltage by using ideal diode model 4. To be able to understand the effect of capacitance on peak rectifier circuits

Equipments and Components used In this lab, the equipments and components we used are:- Power Diodes: 1N4004 (x5); Transformer [12.6V, 1A]; Resistors: 1KΩ @ 1W (x1), 2KΩ @ 1W (x1), 100Ω @ 3W, 200Ω@ 2W (x1), 510Ω@ 1W (x1); Capacitor: 470μF @ 50V (x5) a breadboard, a waveform generator, ±20V power supply, a multimeter, an Oscilloscope to capture the I-V curve, wires and cords.

Lab #3

Figure 1 First, we checked the secondary voltage of the transformer, and we found that Vpp is 20V, and the average voltage is 12.7V and the current is about 1 mA. We, then, estimated the max current and peak inverse voltage across the diode. PIV (Peak Inverse Voltage) was actually the peak value of the secondary voltage of the transformer, which is 10V. The maximum current was calculated from V0/R which was 9.3 mA, where V0 ≈ Vp – VD and VD = 0.7 V (We assumed that rD