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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 497

Programmable baseband filter for software-defined UHF RFID readers

Philip Karantzalis

Abstract

The LTC6602 dual bandpass filter, a programmable baseband filter for high performance UHF radio frequency identification (RFID) readers, is described.

Keywords

Bandpass filter

Radio frequency identification

LTC6602

Introduction

Radio frequency identification (RFID) is an auto-ID technology that identifies any object that contains a coded tag. A UHF RFID system consists of a reader (or interrogator) that transmits information to a tag by modulating an RF signal in the 860MHz–960MHz frequency range. Typically, the tag is passive—it receives all of its operating energy from a reader that transmits a continuous-wave (CW) RF signal. ...

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