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Volume 28 Issue 7
Jan.  2011
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Hu Jian-Min, Wang Yan-Fei, Li He-Ping. Channel Phase Error Estimation and Compensation for Ultra-high Resolution SAR Based on Echo Data[J]. Journal of Electronics & Information Technology, 2012, 34(7): 1602-1608. doi: 10.3724/SP.J.1146.2011.01080
Citation: Jiang Jin-guang, Wang Yao-nan. Realization of Gm-C Filter with Accurate Tunable Frequency[J]. Journal of Electronics & Information Technology, 2006, 28(7): 1335-1339.

Realization of Gm-C Filter with Accurate Tunable Frequency

  • Received Date: 2004-11-15
  • Rev Recd Date: 2005-05-08
  • Publish Date: 2006-07-19
  • 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.
  • 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.
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