J. Semicond. > 2013, Volume 34 > Issue 7 > 075004
|

SEMICONDUCTOR INTEGRATED CIRCUITS

A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers

Xin Cheng1, 2, Haigang Yang1, , Tongqiang Gao1 and Tao Yin1

+ Author Affiliations

 Corresponding author: Yang Haigang, yanghg@mail.ie.ac.cn

DOI: 10.1088/1674-4926/34/7/075004

PDF

Abstract: This paper presents a reconfigurable fifth-order complex Gm-C filter for different data rates in low-IF WiMAX applications. The design procedure and linearized measures to realize the complex filter are described. In order to achieve the reconfigurability of bandwidth window, the center frequency and the cutoff frequency filter are adjusted simultaneously by changing capacitor values while keeping transconductors unchanged. Also, the filter integrates an on-chip automatic frequency tuning circuit based on a PLL. Experimental results show that it has an IRR of 32 dB, a THD of-43 dB, and an input-referred noise of 21 μVrms. The chip is fabricated in 0.13 μm CMOS process, occupies 0.7×1 mm2, and consumes 4.8 mA current from a 1.2 V power supply.

Key words: complex filter, low-IF receiver, WiMAX, frequency tuning



[1]
IEEE Computer Society. IEEE Std 802. 16TM-2004-Air Interface for Fixed Broadband Wireless Access Systems, New York, Oct. 2004
[2]
Jun D, Daisuke M, Yosuke O, et al. A fully integrated 2×1 dual-band direct-conversion mobile WiMAX transceiver with dual-mode fractional divider and noise-shaping transimpedance amplifier in 65 nm CMOS. IEEE J Solid-State Circuits, 2010, 45:2774 doi: 10.1109/JSSC.2010.2075295
[3]
Camus M, Butaye B, Garcia L, et al. A 5.4 mW/0.07 mm2 2.4 GHz front-end receiver in 90 nm CMOS for IEEE 802.15.4 WPAN standard. IEEE J Solid-State Circuits, 2008, 43:1372 doi: 10.1109/JSSC.2008.922720
[4]
Liu S L, Ma H P, Shi Y. A low power Gm-C filter with on-chip automatic tuning for a WLAN transceiver. Journal of Semiconductors, 2010, 31:065008 doi: 10.1088/1674-4926/31/6/065008
[5]
Hesam A A, Erik J P, Edgar S S. A 1-V +31 dBm ⅡP3, reconfigurable, continuously tunable, power-adjustable active-RC LPF. IEEE J Solid-State Circuits, 2009, 44:495 doi: 10.1109/JSSC.2008.2011037
[6]
Pan W G, Ma C Y, Gan Y B, et al. A reconfigurable OTA-C baseband filter with wide digital tuning for GSNN receivers. Journal of Semiconductors, 2010, 31:095006 doi: 10.1088/1674-4926/31/9/095006
[7]
D'Amico S, Giannini V, Baschirotto A. A 4th-order active-Gm-RC reconfigurable (UMTS/WLAN) filter. IEEE J Solid-State Circuits, 2006, 41:1630 doi: 10.1109/JSSC.2006.873676
[8]
Cheng X, Zhong L G, Yang H G, et al. A pseudo differential Gm-C complex filter with frequency tuning for IEEE802.15.4 applications. Journal of Semiconductors, 2011, 32:075005 doi: 10.1088/1674-4926/32/7/075005
[9]
Tajali A, Leblebici Y. Low-power and widely tunable linearized biquadratic low-pass transconductor-C filter. IEEE Trans Circuits Syst Ⅱ:Express Briefs, 2011, 58:159 doi: 10.1109/TCSII.2011.2111530
[10]
Xu Y, Chi B Y, Yu X B, et al. Power-scalable, complex bandpass/low-pass filter with I/Q imbalance calibration for a multimode GSNN receiver. IEEE Trans Circuits Syst Ⅱ:Express Briefs, 2012, 59:30 doi: 10.1109/TCSII.2011.2177700
Fig. 1.  Block diagram of a low-IF receiver.

DownLoad: Full-Size Img PowerPoint
Fig. 2.  (a) Real Gm–C integrator. (b) Complex Gm–C integrator.

DownLoad: Full-Size Img PowerPoint
Fig. 3.  Architecture of the complex filter.

DownLoad: Full-Size Img PowerPoint
Fig. 4.  Capacitor array for mode selection.

DownLoad: Full-Size Img PowerPoint
Fig. 5.  OTA structure (a) with CMFB or (b) without CMFB.

DownLoad: Full-Size Img PowerPoint
Fig. 6.  Variation of HD3 and gmN1 with n.

DownLoad: Full-Size Img PowerPoint
Fig. 7.  Frequency tuning system based on a PLL.

DownLoad: Full-Size Img PowerPoint
Fig. 8.  The VCO structure used in Fig. 7.

DownLoad: Full-Size Img PowerPoint
Fig. 9.  Chip photograph of the whole complex filter

DownLoad: Full-Size Img PowerPoint
Fig. 10.  The transfer function of a complex filter with different input phase sequences

DownLoad: Full-Size Img PowerPoint
Fig. 11.  The output with different input phase sequences at 2.5 MHz

DownLoad: Full-Size Img PowerPoint
Fig. 12.  The comparison of frequency characteristic between simulation and measurement.

DownLoad: Full-Size Img PowerPoint
Fig. 13.  The frequency characteristics under three operation modes.

DownLoad: Full-Size Img PowerPoint
Fig. 14.  The tuning function of the proposed PLL.

DownLoad: Full-Size Img PowerPoint
Fig. 15.  The measured harmonic distortion.

DownLoad: Full-Size Img PowerPoint
Fig. 16.  THD versus input amplitude.

DownLoad: Full-Size Img PowerPoint
Fig. 17.  The measured output noise.

DownLoad: Full-Size Img PowerPoint
Fig. 18.  The measured IIP3.

DownLoad: Full-Size Img PowerPoint

Table 1.   Center frequencies and cutoff frequencies in three modes.

Table 2.   Center frequencies and cutoff frequencies in three modes.
[1]
IEEE Computer Society. IEEE Std 802. 16TM-2004-Air Interface for Fixed Broadband Wireless Access Systems, New York, Oct. 2004
[2]
Jun D, Daisuke M, Yosuke O, et al. A fully integrated 2×1 dual-band direct-conversion mobile WiMAX transceiver with dual-mode fractional divider and noise-shaping transimpedance amplifier in 65 nm CMOS. IEEE J Solid-State Circuits, 2010, 45:2774 doi: 10.1109/JSSC.2010.2075295
[3]
Camus M, Butaye B, Garcia L, et al. A 5.4 mW/0.07 mm2 2.4 GHz front-end receiver in 90 nm CMOS for IEEE 802.15.4 WPAN standard. IEEE J Solid-State Circuits, 2008, 43:1372 doi: 10.1109/JSSC.2008.922720
[4]
Liu S L, Ma H P, Shi Y. A low power Gm-C filter with on-chip automatic tuning for a WLAN transceiver. Journal of Semiconductors, 2010, 31:065008 doi: 10.1088/1674-4926/31/6/065008
[5]
Hesam A A, Erik J P, Edgar S S. A 1-V +31 dBm ⅡP3, reconfigurable, continuously tunable, power-adjustable active-RC LPF. IEEE J Solid-State Circuits, 2009, 44:495 doi: 10.1109/JSSC.2008.2011037
[6]
Pan W G, Ma C Y, Gan Y B, et al. A reconfigurable OTA-C baseband filter with wide digital tuning for GSNN receivers. Journal of Semiconductors, 2010, 31:095006 doi: 10.1088/1674-4926/31/9/095006
[7]
D'Amico S, Giannini V, Baschirotto A. A 4th-order active-Gm-RC reconfigurable (UMTS/WLAN) filter. IEEE J Solid-State Circuits, 2006, 41:1630 doi: 10.1109/JSSC.2006.873676
[8]
Cheng X, Zhong L G, Yang H G, et al. A pseudo differential Gm-C complex filter with frequency tuning for IEEE802.15.4 applications. Journal of Semiconductors, 2011, 32:075005 doi: 10.1088/1674-4926/32/7/075005
[9]
Tajali A, Leblebici Y. Low-power and widely tunable linearized biquadratic low-pass transconductor-C filter. IEEE Trans Circuits Syst Ⅱ:Express Briefs, 2011, 58:159 doi: 10.1109/TCSII.2011.2111530
[10]
Xu Y, Chi B Y, Yu X B, et al. Power-scalable, complex bandpass/low-pass filter with I/Q imbalance calibration for a multimode GSNN receiver. IEEE Trans Circuits Syst Ⅱ:Express Briefs, 2012, 59:30 doi: 10.1109/TCSII.2011.2177700

    • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 2239 Times PDF downloads: 21 Times Cited by: 0 Times

    History

    Received: 29 November 2012 Revised: 15 January 2013 Online: Published: 01 July 2013

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Send
      Article Navigation >  Journal of Semiconductors  > 2013  >  34(7): 075004
      Xin Cheng, Haigang Yang, Tongqiang Gao, Tao Yin. A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers[J]. Journal of Semiconductors, 2013, 34(7): 075004. doi: 10.1088/1674-4926/34/7/075004 ****X Cheng, H G Yang, T Q Gao, T Yin. A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers[J]. J. Semicond., 2013, 34(7): 075004. doi: 10.1088/1674-4926/34/7/075004.
      Citation:
      Xin Cheng, Haigang Yang, Tongqiang Gao, Tao Yin. A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers[J]. Journal of Semiconductors, 2013, 34(7): 075004. doi: 10.1088/1674-4926/34/7/075004 ****
      X Cheng, H G Yang, T Q Gao, T Yin. A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers[J]. J. Semicond., 2013, 34(7): 075004. doi: 10.1088/1674-4926/34/7/075004.
      shu

      A CMOS Gm-C complex filter with a reconfigurable center and cutoff frequencies in low-IF WiMAX receivers

      DOI: 10.1088/1674-4926/34/7/075004
      • 1.

        Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

      • 2.

        University of Chinese Academy of Sciences, Beijing 100049, China

      Funds:

      the National Natural Science Foundation of China 61106025

      Project supported by the National High Technology Research and Development Program of China (No. 2012AA012301) and the National Natural Science Foundation of China (No. 61106025)

      the National High Technology Research and Development Program of China 2012AA012301

      More Information
      • Corresponding author: Yang Haigang, yanghg@mail.ie.ac.cn
      • Received Date: 2012-11-29
      • Revised Date: 2013-01-15
      • Published Date: 2013-07-01

      Catalog

        Journal of Semiconductors © 2017 All Rights Reserved   京ICP备05085259号-2

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return