截止频率精确可调跨导电容滤波器实现

江金光; 王耀南

截止频率精确可调跨导电容滤波器实现

计量
- 文章访问数: 2329
- HTML全文浏览量: 146
- PDF下载量: 1207
- 被引次数: 0
出版历程
- 收稿日期: 2004-11-15
- 修回日期: 2005-05-08
- 刊出日期: 2006-07-19

Realization of Gm-C Filter with Accurate Tunable Frequency

摘要

摘要: 提出了一种新的利用开关电容技术调节偏置电流值大小的电路，应用该电路可以精确调节跨导运放Gm值的大小。采用既具有电压共模负反馈(CMFB)电路, 又同时具有工作在线性区的MOS管作源极反馈有源电阻, 实现其良好线性度的跨导运放。设计了三阶椭圆函数低通滤波器，并实现其频率的精确可调。应用台积电(TSMC)2层多晶硅，4层金属(2P4M)，3.3V电源电压，0.35m CMOS工艺Spice model仿真得到的频响曲线与理想情况十分接近。
- 电压共模负反馈;频率可调; 跨导电容滤波器;源极反馈有源电阻; 椭圆函数滤波器
Abstract: This paper presents a new circuit to tune Gm value of transconductor accurately which employs switched-capacitor technique to change the bias current of transconductor. A third order elliptical function lowpass filter with accurate tunable frequency is designed using transconductor that is not only with voltage common-mode negative feedback, but also with varying bias-triode transistors to improve the linearity of this circuit. Simulated results show that the practical frequency response of the filter is very near to that of idealized circumstance by applying TSMC 2-poly 4-metal 3.3V power supply 0.35m CMOS technology Spice model.

HTML全文

参考文献(1)

Tsividis Y P. Integrated continuous-time filter design: an overview[J].IEEE J. of Solid-State Circuits.1994, 29(3):166-[2]Chang Zhong-Yuan, Macq D, Hapeslagh D, et al.. A CMOSanalog front-end circuit for an FDM-Based ADSL system[J].IEEEJ. of Solid-State Circuits.1995, 30(12):1449-[3]Krummenacher F, Joehl N. A 4MHz CMOS continuous-time filterwith on-chip automatic tuning[J].IEEE J. of Solid-State Circuits.1988, 23(3):750-[4]Martinz S J, Steyaert M S J, Sansen W M C A large-signalvery low-distortion transconductor for high- frequencycontinuous-time filters. IEEE J[J].of Solid-State Circuits.1991,26(7):946-[5]Yamazaki H, Oishi K, Gotoh K. An accurate center frequencytuning scheme for 450kHz CMOS Gm-C bandpass filters[J].IEEE J.of Solid-State Circuits.1999, 34(12):1691-[6]Gopinathan V, Tarsia M, Choi D. Design considerations andimplementation of a programmable high-frequency continuoustimefilter and variable-gain amplifier in submicrometer CMOS[J].IEEE J. of Solid-State Circuits.1999, 34(12):1698-[7]Pavan S, Tsividis Y P, Nagaraj K. Widely programmablehigh-frequency continuous-time filters in digitals CMOStechnology[J].IEEE J. of Solid-State Circuits.2000, 35(4):503-[8]Fiez T, Allstot D.J. CMOS switched-current ladder filters[J].IEEE J.of Solid-State Circuits.1990, 25(6):1360-[9]Zele R H, Allstot D J. Low-voltage fully differentialswitched-current filter[J].IEEE J. of Solid-State Circuits.1994,29(3):203-[10]Moon U K, Song B S. Design of a low-distortion 22-kHzfifth-order Bessel filter[J].IEEE J. of Solid-State Circuits.1993,28(12):1254-[11]Wu J, Masry E E. Current-mode ladder filters using multipleoutput current conveyors[J].IEE Proc.-Circuits Devices Sys.t.1996,143(4):218-[12]Sun Y, Fidler J K. Current-mode OTA-C realization of arbitraryfilter characteristics[J].Electronics Letters.1996, 32(13):1181-[13]Sun Y. Second-order OTA-C filters derived from Nawrocki-Kleinbiquad[J].Electronics Letters.1998, 34(15):149-[14]Sun Y. Note on two integrator loop OTA-C configurations[J].Electronics Letters.1998, 34(16):1533-[15]Williams A B, Taylor F J. Electronic filter design handbook-LC,active, and digital filters.(second edition). Mcgraw-HillPublishing Company, 1988.[16]Johns D, Ken Martin K. Analog integrated circuit design. JohnWiley Sons, Inc. chapter 15.[17]Razavi B, 陈贵灿，程军，et al. 模拟CMOS 集成电路设计.西安: 西安交通大学出版社：第3 章.[18]何怡刚，吴杰，蔡国昌. 基于积分器的最少元件GFLFOTA 接地电容滤波器. 电路与系统学报，1997, 2(4): 22 . 27.[19]何怡刚，蔡国昌，吴杰，陈洪云. CMOS 跨导电容滤波器. 微电子学，1997, 27(3): 159 . 163.

施引文献

资源附件(0)

访问统计