用于802.11b发射通道的重构滤波器  

A Reconstruction Opamp-RC Filter Used in Transmitter of WLAN 802.11 b

作　　者：高小平[1] 何济柔[1] 黄煜梅[1] 洪志良[1] 

机构地区：[1]复旦大学张江校区专用集成电路与系统国家重点实验室,上海201203

出　　处：《固体电子学研究与进展》2007年第2期264-268,共5页Research & Progress of SSE

摘　　要：提出了一种满足IEEE802.11b标准发射机的低功耗高线性度ChebyshevI型低通滤波器的设计并已实现。该滤波器建立在高增益带宽积运放的基础上,采用Leapfrog结构,最大程度地减小元件值、温漂和工艺容差对滤波器性能的影响,同时采用Opamp-RC技术提高了电路的动态范围和线性度。该滤波器用0.18μmCMOS实现,所占芯片面积为0.58mm×0.5mm,通过测试基本上达到系统提出的指标。该电路在1.8V的工作电压下,共消耗4.4mA电流。A low-power high linearity ChebyshevI LPF is described,which is built in a high gain-bandwidth opamp,adoptting Leapfrog structure to minimize the sensitivity to devices' value which can be seriously affected by temperature derivation and process tolerance.Also it has used Opamp-RC technique to enhance the dynamic range of handled signal and the linearity of LPF.It is designed for 802.11 b wireless LAN application and has been implemented in 0.18 μm CMOS process.The whole die is 0.58 mm×0.5 mm.Test results s...

关 键 词：无线局域网 802.11b 滤波器 Opamp-RC 温度漂移 工艺容差 

分 类 号：TN713[电子电信—电路与系统]