AD8345屬于RF/IF射頻/中頻RFID的RF調(diào)制器。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD8345RF 調(diào)制器射頻 (RF) 調(diào)制器產(chǎn)品用于通過更改載波的幅度、相位和/或頻率，將信息編碼到正弦載波信號上。執(zhí)行反向解調(diào)操作的接收設(shè)備會選擇性地以所需載波頻率接收傳入信號，從而將載波屬性的變化轉(zhuǎn)換回原始形式。這樣的配置允許使用通信通道來同時傳輸多條消息，而彼此之間沒有干擾。

INTRODUCTION

The in-phase and quadrature modulator (IQ modulator) is a key component in modern wireless transmitters. It provides a convenient method for modulating data bits or symbols onto an RF carrier. IQ upconversion has become the architecture of choice for implementing transmitter signal chains for end applications such as cellular, WiMAX, and wireless point-topoint. IQ modulators, however, can degrade signal fidelity in ways that are somewhat unique. These effects can degrade the quality of the transmitted signal during the modulation process, resulting in degraded error vector magnitude (EVM) at the receiver, which in turn degrades bit error rate (BER). Fortunately, algorithms exist that can correct these imperfections.