J. Semicond. > 2014, Volume 35 > Issue 9 > 095003
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SEMICONDUCTOR INTEGRATED CIRCUITS

A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers

Qiongbing Liu, Xiaobao Yu, Junfeng Zhang, Yang Xu and Baoyong Chi

+ Author Affiliations

 Corresponding author: Chi Baoyong, Email:chibylxc@tsinghua.edu.cn

DOI: 10.1088/1674-4926/35/9/095003

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Abstract: A reconfigurable complex band-pass (CBP)/low-pass (LP) active-RC filter with a noise-shaping technique for wireless receivers is presented. Its bandwidth is reconfigurable among 500 kHz, 1 MHz and 4 MHz in LP mode and 1 MHz, 2 MHz and 8 MHz in CBP mode with 3 MHz center frequency. The Op-Amps used in the filter are realized in cell arrays in order to obtain scalable power consumption among the different operation modes. Furthermore, the filter can be configured into the 1st order, 2nd order or 3rd order mode, thus achieving a flexible filtering property. The noise-shaping technique is introduced to suppress the flicker noise contribution. The filter has been implemented in 180 nm CMOS and consumes less than 3 mA in the 3rd 8 MHz-bandwidth CBP mode. The spot noise at 100 Hz can be reduced by 14.4 dB at most with the introduced noise-shaping technique.

Key words: active-RC filter, noise-shaping trans-impedance amplifier, flicker noise, power-scalable



[1]
Lo T Y, Hung C C, Ismail M. A wide tuning range Gm-C filter for multi-mode CMOS direct-conversion wireless receivers. IEEE J Solid-State Circuits, 2009, 44(9):2515 doi: 10.1109/JSSC.2009.2023154
[2]
Amir-Aslanzadeh H, Pankratz E J, Sánchez-Sinencio E. A 1-V+31 dBm ⅡP3, reconfigurable, continuously tunable, power-adjustable active-RC LPF. IEEE J Solid-State Circuits, 2009, 44(2):495 doi: 10.1109/JSSC.2008.2011037
[3]
Xu Y, Chi B, Yu X, et al. Power-scalable, complex bandpass/low-pass filter with I/Q imbalance calibration for a multimode GNSS receiver. IEEE J Trans Circuits Syst Ⅱ:Express Briefs, 2012, 59(1):30 doi: 10.1109/TCSII.2011.2177700
[4]
Qi N, Song Z, Chi B, et al. A multi-mode complex bandpass filter with gm-assisted power optimization and I/Q calibration. IEEE International Symposium on Circuits and Systems (ISCAS), 2013:1845
[5]
Deguchi J, Miyashita D, Ogasawara Y, et al. A fully integrated 2×1 dual-band direct-conversion transceiver with dual-mode fractional divider and noise-shaping TIA for mobile WiMAX SoC in 65 nm CMOS. IEEE International Solid-State Circuits Conference (ISSCC), 2010:456
[6]
Balankutty A, Yu S A, Feng Y, et al. A 0.6-V zero-IF/low-IF receiver with integrated fractional-N synthesizer for 2.4-GHz ISM-band applications. IEEE J Solid-State Circuits, 2010, 45(3):538 doi: 10.1109/JSSC.2009.2039827
Fig. 1.  Architecture of the proposed noise-shaping LP/C-BP filer

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Fig. 2.  Op-Amp cell array for scalable GBW

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Fig. 3.  Noise-shaping integrator. (a) Basic principle. (b) Circuit realization of the negative trans-impedance cell

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Fig. 4.  Block diagram of (a) basic integrator, (b) noise-shaping integrator

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Fig. 5.  Frequency response of the LP filter with each order and 4 MHz bandwidth

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Fig. 6.  Frequency response of the 3rd order CBP filter with different bandwidths

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Fig. 7.  The equivalent input spot noise of the 1st order LP filter in 4 MHz mode

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Fig. 8.  The equivalent input spot noise of the LP filter in each mode at the frequency of 100 Hz

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Fig. 9.  The power consumption of the CBP filter in each mode

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Table 1.   Performances summary and comparision
[1]
Lo T Y, Hung C C, Ismail M. A wide tuning range Gm-C filter for multi-mode CMOS direct-conversion wireless receivers. IEEE J Solid-State Circuits, 2009, 44(9):2515 doi: 10.1109/JSSC.2009.2023154
[2]
Amir-Aslanzadeh H, Pankratz E J, Sánchez-Sinencio E. A 1-V+31 dBm ⅡP3, reconfigurable, continuously tunable, power-adjustable active-RC LPF. IEEE J Solid-State Circuits, 2009, 44(2):495 doi: 10.1109/JSSC.2008.2011037
[3]
Xu Y, Chi B, Yu X, et al. Power-scalable, complex bandpass/low-pass filter with I/Q imbalance calibration for a multimode GNSS receiver. IEEE J Trans Circuits Syst Ⅱ:Express Briefs, 2012, 59(1):30 doi: 10.1109/TCSII.2011.2177700
[4]
Qi N, Song Z, Chi B, et al. A multi-mode complex bandpass filter with gm-assisted power optimization and I/Q calibration. IEEE International Symposium on Circuits and Systems (ISCAS), 2013:1845
[5]
Deguchi J, Miyashita D, Ogasawara Y, et al. A fully integrated 2×1 dual-band direct-conversion transceiver with dual-mode fractional divider and noise-shaping TIA for mobile WiMAX SoC in 65 nm CMOS. IEEE International Solid-State Circuits Conference (ISSCC), 2010:456
[6]
Balankutty A, Yu S A, Feng Y, et al. A 0.6-V zero-IF/low-IF receiver with integrated fractional-N synthesizer for 2.4-GHz ISM-band applications. IEEE J Solid-State Circuits, 2010, 45(3):538 doi: 10.1109/JSSC.2009.2039827

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    Received: 10 January 2014 Revised: 06 March 2014 Online: Published: 01 September 2014

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      Article Navigation >  Journal of Semiconductors  > 2014  >  35(9): 095003
      Qiongbing Liu, Xiaobao Yu, Junfeng Zhang, Yang Xu, Baoyong Chi. A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers[J]. Journal of Semiconductors, 2014, 35(9): 095003. doi: 10.1088/1674-4926/35/9/095003 ****Q B Liu, X B Yu, J F Zhang, Y Xu, B Y Chi. A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers[J]. J. Semicond., 2014, 35(9): 095003. doi: 10.1088/1674-4926/35/9/095003.
      Citation:
      Qiongbing Liu, Xiaobao Yu, Junfeng Zhang, Yang Xu, Baoyong Chi. A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers[J]. Journal of Semiconductors, 2014, 35(9): 095003. doi: 10.1088/1674-4926/35/9/095003 ****
      Q B Liu, X B Yu, J F Zhang, Y Xu, B Y Chi. A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers[J]. J. Semicond., 2014, 35(9): 095003. doi: 10.1088/1674-4926/35/9/095003.
      shu

      A reconfigurable CBP/LP active RC filter with noise-shaping technique for wireless receivers

      DOI: 10.1088/1674-4926/35/9/095003

      • Institute of Microelectronics, Tsinghua University, Beijing 100084, China

      Funds:

      the National Science and Technology Major Projects of China 2012ZX03004007

      the National Natural Science Foundation of China 61020106006

      Project supported by the National Science and Technology Major Projects of China (No. 2012ZX03004007) and the National Natural Science Foundation of China (Nos. 61020106006, 61076029)

      the National Natural Science Foundation of China 61076029

      More Information
      • Corresponding author: Chi Baoyong, Email:chibylxc@tsinghua.edu.cn
      • Received Date: 2014-01-10
      • Revised Date: 2014-03-06
      • Published Date: 2014-09-01

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