| 用于802.11b发射通道的重构滤波器 |
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| 引用本文： | 高小平,何济柔,黄煜梅,洪志良.用于802.11b发射通道的重构滤波器[J].固体电子学研究与进展,2007,27(2):264-268. |
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| 作者姓名： | 高小平 何济柔 黄煜梅 洪志良 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 无线局域网 802.11b 滤波器 Opamp-RC 温度漂移 工艺容差 |
| 文章编号： | 1000-3819(2007)02-264-05 |
| 修稿时间： | 2006年6月19日 |
A Reconstruction Opamp-RC Filter Used in Transmitter of WLAN 802.11 b |
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| GAO Xiaoping,HE Jirou,HUANG Yumei,HONG Zhiliang.A Reconstruction Opamp-RC Filter Used in Transmitter of WLAN 802.11 b[J].Research & Progress of Solid State Electronics,2007,27(2):264-268. |
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| Authors: | GAO Xiaoping HE Jirou HUANG Yumei HONG Zhiliang |
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| Abstract: | 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 show that performance of this LPF can meet requirement proposed by system.This circuit consumes 4.4 mA of current from a 1.8 V supply totally. |
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| Keywords: | WLAN 802 11 b filter Opamp-RC temperature drift process tolerance |
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