导航通信系统中频可变增益放大器设计  

Design of an IF PGA in a positioning communication system

作　　者：王旭[1] 蒋培晨[1] 陈东坡[1] 

机构地区：[1]上海交通大学微电子学院,上海200240

出　　处：《信息技术》2010年第4期24-25,29,共3页Information Technology

基　　金：国家863计划资助(2008AA12Z310)

摘　　要：实现了一个GPS/伽利略双模导航通信系统中频可变增益放大器(中频6MHz,带宽2MHz/中频16MHz,带宽10MHz)。增益有4档可调,从16dB至34dB,每6dB一档。闭环电阻反馈结构保证了高线性度需求。在最高增益模式下,通带波纹小于0.2dB,输入噪声小于15nV/sqrt(Hz),该放大器同时含有直流失调抑制功能。采用SMIC0.18μm工艺,1.8V电源电压,功耗为9mW。该接收机系统已成功流片。This paper presents a programmable gain amplifier（PGA） for GPS/Galileo dual mode（6MHz IF,2MHz bandwidth/16MHz IF,10MHz bandwidth） positioning system receiver. The overall PGA gain varies from 16dB to 34dB with 6dB per step. A negative feedback approach achieves high linearity requirement. Under highest gain mode,the passband gain ripple is less than 0.2dB and the input referred noise is less than 15nV/sqrt（Hz）. The amplifier also contains function of DC offset suppression. With SMIC0.18μm technology,this work dissipates 9mW from a 1.8V supply voltage. This chip is successfully taped-out.

关 键 词：中频 可变增益 直流失调 

分 类 号：TN722.5[电子电信—电路与系统]