上变频混频器LT5519的原理与应用  

Principle and Application of Upconverting Mixer LT5519

作　　者：周云水[1] 黄兴城[1] 

机构地区：[1]浙江工业大学之江学院,浙江杭州310024

出　　处：《现代电子技术》2005年第20期8-9,共2页Modern Electronics Technique

摘　　要：LT5519是Linear公司推出的高线性度上变频RF混频器.该芯片由双平衡混频器、高性能本振缓冲器、偏置/使能电路组成.LT5519 的有源混频器结合了低失真、低LO(本地振荡器)驱动要求、端口至端口高度隔离、低转换损耗等性能.LT5519工作在 0.7～1.4 GHz频率范围,其RF输出端集成了RF变换器,并有匹配电阻,有效地减少了外围匹配元件.他可工作于一端接地的单端模式.LT5519可应用于高线性度的无线基础设施、有线下行链路基础设施、点对点和一点对多点的数据通信和高线性渡的频率转换器等器件中.本文介绍了LT5519的特性、原理及应用电路.LT5519 is a high linearity up- converting mixer of Linear Technology Corporation. It consists of a double -balanced mixer, a high performance LO buffer and bias/enable circuits. A high speed LO amplifier drives a double -balanced mixer core, allowing the use of a low power,single -ended LO source. The RF output integrates RF,with an internal RF transformer providing an impedance match across the band. It is intended to be used in single - ended mode by connecting one input of each pair to ground. It can be used in wireless infrastructure ,cable downlink infrastructure ,point-to-point and point-to-multipoint data communications and high linearity frequency conversion. This paper introduces the features,principle and application of LT5519.

关 键 词：LT5519 上变频 混频器 RF 

分 类 号：TN773[电子电信—电路与系统]