一种低功耗高线性Gm-C滤波器的设计

设计了一种应用于W-CDMA零中频接收机系统的跨导-电容（Gm-C）低通滤波器及其调谐电路.该接收机中的滤波器采用截止频率为2.2 MHz的3阶巴特沃斯滤波器,在10 MHz频率处的阻带衰减达到34 dB.电路采用SMIC 0.18 μm CMOS工艺模型,在电源电压为1.8V时,滤波器的IIP3可达到21.13 dBm,电路功耗为3.31 mW.同时,该滤波器采用开关电容调谐电路来精确控制滤波器的截止频率,将截止频率的偏差降低到3％以下....

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Bibliographic Details
Published in电子技术应用 Vol. 40; no. 11; pp. 53 - 56
Main Author 张荣晶 黄继伟 胡炜 张千文 陈俊龙 吴嘉士
Format Journal Article
LanguageChinese
Published 福州大学物理与信息工程学院福建省集成电路设计中心,福建福州,350003 2014
Subjects
低通滤波器
自动调谐电路
跨导放大器
零中频接收机
automatic tuned circuit
transconductance amplifier
low pass filter
跨导放大器
低通滤波器
零中频接收机
自动调谐电路
zero-IF reciever
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ISSN0258-7998

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Summary:设计了一种应用于W-CDMA零中频接收机系统的跨导-电容（Gm-C）低通滤波器及其调谐电路.该接收机中的滤波器采用截止频率为2.2 MHz的3阶巴特沃斯滤波器,在10 MHz频率处的阻带衰减达到34 dB.电路采用SMIC 0.18 μm CMOS工艺模型,在电源电压为1.8V时,滤波器的IIP3可达到21.13 dBm,电路功耗为3.31 mW.同时,该滤波器采用开关电容调谐电路来精确控制滤波器的截止频率,将截止频率的偏差降低到3％以下.
Bibliography:Zhang Rongjing,Huang Jiwei,Hu Wei,Zhang Qianwen,Chen Junlong,Wu Jiashi（ 1.Fujian Integrated Circuit Design Center,College of Physics and Information Engineering,Fuzhou University, Fuzhou 350003,China;）
zero-IF reciever ; transconductance amplifier ; low pass filter ; automatic tuned circuit
11-2305/TN
A transconductance-C （Gm-C） low pass filter and its tuned circuit for W-CDMA standard applications in zero-IF reciever arc proposed.In the reciever,a 3rd-order Butterworth low pass filter is adopted,which has cut-off frequency of 2.2 MHz and stop-band attenuation of 34 dB at 10 MHz frequency.Using SMIC 0.18 μm CMOS process,the proposed filter achieves an IIP3 up to 21.13 dBm and consumes the power of 3.31 mW under the power supply voltage of 1.8 V.An automatic tuned circuit based on switched-capacitor circuit is used to precisely control the cut-off frequency of this filter,which can reduce the cut-off frequency deviation to less than 3％.
ISSN:0258-7998