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一种低通/复数双模式滤波器的设计 被引量：1

Design of a Low-Pass/Polyphase Dual-Mode Filter
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摘要 从系统优化以节省面积和减小功耗的目的出发,设计了一种适用于2.4 GHz Zigbee无线收发芯片的双模滤波器电路。该滤波器采用时分复用和电路复用的方法,可工作于低通滤波和复数滤波两种模式。电路采用OTA-C 7阶巴特沃思结构,利用0.18μm CMOS工艺实现。设计中,采用基于CCO锁相环的频率修调电路,以减小滤波器频率偏差。测试结果表明,低通滤波模式时,带宽为1.45 MHz,偏移3 MHz抑制为55 dB;在复数滤波模式下,镜像抑制可达35 dB;在1.8 V电源电压下,滤波器和修正电路电流分别为0.86 mA和0.23 mA。 To save area and reduce power for system optimization, a dual-mode filter was designed for a 2. 4 GHz Zigbee wireless transceiver. With time division and circuit reuse, this filter works at a low pass or a poly-phase mode. Implemented in 0. 18μm CMOS technology, the filter uses a 7th-order Butterworth OTA-C architecture. A CCO PLL-based frequency tuning circuit was adopted to minimize frequency variation. Test results showed that, in low-pass mode, the filter had a bandwidth of about 1.45 MHz, and an out-of-band rejection of 55 dB at 3 MHz offset, and in poly-phase mode, its image rejection ratio was over 35 dB. Under 1.8 V supply voltage, the filter and the tuning loop dissipates 0. 86 mA and 0. 23 mA of power, respectively.
作者 甘业兵 潘文光 马成炎 袁国顺
机构地区 中国科学院微电子研究所 杭州中科微电子有限公司
出处 《微电子学》 CAS CSCD 北大核心 2009年第4期478-482,共5页 Microelectronics
基金 2006年浙江省重大科技专项(2006C11107)
关键词 双模式 低通滤波 复数滤波 OTA 频率修调 CCO 锁相环 Dual-mode Low pass filter Polyphase filter OTA Frequency tuning CCO PLL
分类号 TN713.8 [电子电信—电路与系统]
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参考文献14

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二级参考文献18

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微电子学
2009年 第4期

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