Computer Engineering and Applications ›› 2015, Vol. 51 ›› Issue (11): 266-270.

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

ZHANG Mingmin1, ZENG Yun1, WEI Baoyue2, FAN Xiaohua2, ZHANG Haiying2   

  1. 1.School of Physics and Microelectronics Science, Hunan University, Changsha 410082, China
    2.Institute of Microelectronics, The Chinese Academy of Sciences, Beijing 100029, China
  • Online:2015-06-01 Published:2015-06-12


张明敏1,曾  云1,卫宝跃2,樊晓华2,张海英2   

  1. 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

Abstract: 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 kHz, 140 kHz to 210 kHz. It is designed with SMIC 0.18 μm CMOS process. The simulation results show that the IIP3 of filter is 22.6 dBm and it consumes 1.37 mW under a 1.8 V power supply.

Key words: low-pass filter, transconductor, low power, highly linearity, multiband

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 kHz,140 kHz和210 kHz多频带选择。采用SMIC 0.18 μm CMOS工艺设计的滤波器的线性度IIP3大于22.6 dBm,在1.8 V电源电压下消耗的功耗为1.37 mW。

关键词: 低通滤波器, 跨导器, 低功耗, 高线性, 多频带