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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 297

Basic flashlamp illumination circuitry for cellular telephones/cameras

Jim Williams

Abstract

A basic flashlamp illumination circuit for cellular telephones/cameras is described.

Keywords

Flashlamp

flash illumination

camera

LT3468-1

Introduction

Next generation cellular telephones will include high quality photographic capability. Flashlamp-based lighting is crucial for good photographic performance. A previous full-length Linear Technology publication detailed flash illumination issues and presented flash circuitry equipped with “red-eye” reduction capability.1,2 Some applications do not require this feature; deleting it results in an extremely simple and compact flashlamp solution.

Flashlamp circuitry

Figure 297.1 ...

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