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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 323

Tiny RGB video multiplexer switches pixels at 100MHz

Frank Cox and John Wright

Abstract

The LT1675, a new 3-channel, 2-input 250MHz video multiplexer that is designed for pixel switching, video graphics and RGB routing, is described.

Keywords

RGB video multiplexer

pixel switching

LT1675

Introduction

The LT1675, a new 3-channel, 2-input 250MHz video multiplexer, is designed for pixel switching, video graphics and RGB routing. The complete circuit squeezes into a 16-lead SSOP package and uses only 0.25 in2 of PC board area (Figure 323.1). The LT1675 features a fixed gain of 2 for driving double-terminated cables. By incorporating internal feedback resistors, the circuit simplifies PC board layout and boosts performance by ...

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