低功耗高线性多频带Gm-C低通滤波器  

Low power and highly linearity multiband Gm-C low-pass filter

作　　者：张明敏[1] 曾云[1] 卫宝跃[2] 樊晓华[2] 张海英[2] 

机构地区：[1]湖南大学物理与微电子科学学院,长沙410082 [2]中国科学院微电子研究所,北京100029

出　　处：《计算机工程与应用》2015年第11期266-270,共5页Computer Engineering and Applications

基　　金：新一代通信射频芯片技术北京市重点实验室2012年度阶梯计划项目(No.BZ0155)

摘　　要：基于翻转电压跟随器(Flipped Voltage Follower,FVF)的拓扑结构,实现了一种低功耗高线性的跨导器,跨导值可由控制电压精确改变。运用此跨导单元设计了一种适用于无线收发机系统的多频带Gm-C低通滤波器。该滤波器是由双二次节级联构成的六阶巴特沃斯型滤波器,可实现70 k Hz,140 k Hz和210 k Hz多频带选择。采用SMIC 0.18μm CMOS工艺设计的滤波器的线性度IIP3大于22.6 d Bm,在1.8 V电源电压下消耗的功耗为1.37 m W。A low power and high linearity transconductor is presented. It is based on the topology of Flipped Voltage Follower（FVF）, and the transconductor value can be precisely set by the control voltage. A multiband Gm-C Low-Pass Filter（LPF）for wireless transceiver system based on the proposed transconductor is designed. LPF is a 6th-order Butterworth filter formed by 3 Biquads. The filter cut-off frequency can be varied from 70 k Hz, 140 k Hz to 210 k Hz. It is designed with SMIC 0.18 μm CMOS process. The simulation results show that the IIP3 of filter is 22.6 d Bm and it consumes 1.37 m W under a 1.8 V power supply.

关 键 词：低通滤波器 跨导器 低功耗 高线性 多频带 

分 类 号：TN911.71[电子电信—通信与信息系统]