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Category: Science and Technology
Date Submitted: 01/15/2013 05:12 AM
University of Geneva
TPA-Electronique
Diodes Contents
1 Introduction 1.1 Diode equation . . . . . . . . 1.1.1 Reverse Bias . . . . . 1.1.2 Forward Bias . . . . . 1.2 General Diode Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 2 2 3 3 4 4 4 5 5 7 7 7 8 8 8 8 9
2 Types of diodes 2.1 Rectifier diodes . . . . . . . . . . . 2.1.1 Half-wave rectifier . . . . . 2.1.2 Full-wave rectifier . . . . . . 2.1.3 Rectifier filters . . . . . . . 2.1.4 An application of rectifiers . 2.2 Switching diodes . . . . . . . . . . 2.2.1 Clipping . . . . . . . . . . . 2.2.2 Clamping . . . . . . . . . . 2.3 Zener diodes . . . . . . . . . . . . 2.4 Optical diodes . . . . . . . . . . . 2.4.1 LED (Light Emitting Diode) 2.4.2 Photodiode . . . . . . . . . 2.4.3 Optocoupler . . . . . . . . .
1
Introduction
A diode is a dispositive made of a semiconductor material, which has two terminals or electrodes (di-ode), that act like an on-off switch. When the diode is “on”, it acts as a short circuit and passes all current. When it is “off”, it behaves like an open circuit and passes no current. The two terminals are different and are marked as plus and minus in figure 1. If the polarity of the...