CONSTRUCTION OF VOLTAGE DOUBLER

CONSTRUCTION OF VOLTAGE DOUBLER

CHAPTER ONE

INTRODUCTION

1.1     Background of Study

In electronics, majority of the electronics equipments if not all, requires a steady D.C. power source. Even portable low power systems that make use of battery, are not exempted in this regard. But most frequently, electronic equipments are energized by PHCN. This power comes in A.C. form which is not useful to the electronic equipments while still in its A.C. form but becomes useful after it has been converted to D.C power source. This therefore suggests that a means must be derived to satisfy the need of these equipments which now entails a satisfactory, conversion of A.C to D.C of the supply.

It is also necessary to have multipliers of certain voltage. The voltage multipliers circuits are simply diode rectifier circuits that deliver direct current (D.C.) output voltages that are several times the peak amplitude of the applied alternating voltage. By multiplying the alternating current supply voltage to the desired D.C level, it will help to omit the expensive step up power transformers required in conventional rectifiers. For example, in colour television sets, the voltage at the tubes final anode is in the region of 26kv or more and this can be achieved by using a component (the Tripler) that triples the voltage at its input. This eliminates the need for heavy and costly power transformers.

Specifically, a voltage doubler is an electronic circuit with an alternating current input and a direct current output of roughly twice the peak input voltage. The term is usually applied to circuits consisting of rectifying diodes and capacitors only. Other means of doubling voltages are not included.

The voltage doubling circuits consist of diodes, which is for the rectification by converting alternating current to direct in the output. And capacitors, which are to store charges and to filter-out the ripple component, to give a much steady direct current for use by the electronic equipment.

1.2     Statement of the Problem

1.3     Objectives of the Project

The objective of this project is to produce the highest possible voltage which would be unpractical to obtain from transformers due to the bulk of the insulations required. By using only capacitors and diodes. This voltage doubler circuit should be able to step-up relatively low voltage to higher values, while at the same time being far lighter and cheaper than transformers.

1.4     Significance of the Project

In electronics, a voltage doubler is necessary for many applications, as it is being used in most electronic appliances.