J. Semicond. > 2013, Volume 34 > Issue 6 > 065009
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SEMICONDUCTOR INTEGRATED CIRCUITS

A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications

Songting Li, Jiancheng Li, Xiaochen Gu and Hongyi Wang

+ Author Affiliations

 Corresponding author: Li Jiancheng, Email:lijc@nudt.edu.cnb

DOI: 10.1088/1674-4926/34/6/065009

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Abstract: This paper presents a continuously and widely tunable analog baseband chain with a digital-assisted calibration scheme implemented on a 0.13 μm CMOS technology. The analog baseband is compliant with several digital broadcasting system (DBS) standards, including DVB-S, DVB-S2, and ABS-S. The cut-off frequency of the baseband circuit can be changed continuously from 4.5 to 32 MHz. The gain adjustment range is from 6 to 55.5 dB with 0.5 dB step. The calibration includes automatic frequency tuning (AFT) and automatic DC offset calibration (DCOC) to achieve less than 6% cut-off frequency deviation and 3 mV residual output offset. The out-of-band ⅡP2 and ⅡP3 of the overall chain are 45 dBm and 18 dBm respectively, while the input referred noise (IRN) is 17.4 nV/$\sqrt{\rm Hz}$ All circuit blocks are operated at 2.8 V from LDO and consume current of 20.4 mA in the receiving mode.

Key words: analog baseband, continuously and widely tunable LPF, digital broadcasting system, digital-assisted DC offset calibration, digital-assisted automatic frequency tuning



[1]
Santo A S, Giovanni G, Tino C, et al. A Ku-band monolithic receiver for DVB-S applications. IEEE Commun Mag, 2004:132
[2]
Kuo M C, Kao S W, Chen C H, et al. A 1.2 V 114 mW dual-band direct-conversion DVB-H tuner in 0.13μm CMOS. IEEE J Solid-State Circuits, 2009, 44(3):745
[3]
Yang Z, Wen G J, Feng X. A 2.5-V 56-mW baseband chain in a multistandard TV tuner for mobile and media application. Journal of Semiconductors, 2011, 32(3):035003 doi: 10.1088/1674-4926/32/3/035003
[4]
Shin H, Kim Y. A CMOS active-RC low-pass filter with simultaneously tunable high-and low-cutoff frequency for IEEE 802.22 applications. IEEE Trans Circuits Syst Ⅱ, 2010, 57(2):85 doi: 10.1109/TCSII.2009.2037994
[5]
Lee T C, Sun C P. Analog baseband circuits for WCDMA direct-conversion receivers. Bulletin of the College of Engineering, N. T. U., 2005, 93:23
[6]
Iason V, Kostis V, Nikos H, et al. A 65 nm CMOS multistandard, multiband TV tuner for mobile and multimedia applications. IEEE J Solid-State Circuits, 2008, 43(7):1522 doi: 10.1109/JSSC.2008.923721
[7]
Shin H Y, Kuo C N, Chen W H, et al. A 250 MHz 14 dB-NF 73 dB-gain 82 dB-DR analog baseband chain with digital-assisted DC-offset calibration for ultra-wideband. IEEE J Solid-State Circuits, 2010, 45(2):338 doi: 10.1109/JSSC.2009.2036320
[8]
Dufrene K, Boos Z, Weigel R. Digital adaptive ⅡP2 calibration scheme for CMOS down conversion mixers. IEEE J Solid-State Circuits, 2008, 43(11):2434 doi: 10.1109/JSSC.2008.2005453
[9]
Xie R Z, Chen J, Li W N, et al. A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers. IEEE 9th International Conference on ASIC, 2011:1058
[10]
Amico S, Conta M, Baschirotto A. A 4.1 mW 79 dB-DR 4th-order source-follower-based continuous-time filter for WLAN receivers. ISSCC Dig Tech Papers, 2006:352
[11]
Liao Y C, Tang Z W, Min H. A CMOS wide-band low-noise amplifier with balun-based noise-canceling technique. IEEE ASSCC, 2007:91
[12]
Vasilopoulos A, Vitzilaios G. A low-power wideband reconfigurable integrated active-RC filter with 73 dB SFDR. IEEE J Solid-State Circuits, 2006, 41(9):1997 doi: 10.1109/JSSC.2006.880616
[13]
Zhou J, Li W, Huang D P, et al. Dual-mode VCO based low-power synthesizer with optimized atomatic frequency calibration for software-defined radio. Proc ICASC, 2010:1145
[14]
Huang D P, Li W, Zhou J, et al. A frequency synthesizer with optimally coupled QVCO and harmonic-rejection SSB mixer for multi-standard wireless receiver. IEEE J Solid-State Circuits, 2011, 46(6):1307 doi: 10.1109/JSSC.2011.2124970
[15]
Kitsunezuka M, Hori S, Maeda T. A widely-tunable, reconfigurable CMOS analog baseband IC for software-defined radio. IEEE J Solid-State Circuits, 2009, 44(9):2496 doi: 10.1109/JSSC.2009.2023275
Fig. 1.  Block diagram of a DVB-S/S2 & ABS-S system

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Fig. 2.  The interferers for C-band DBS application

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Fig. 3.  The chip architecture and analog baseband chain

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Fig. 4.  LPF architecture

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Fig. 5.  PGA architecture

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Fig. 6.  (a) Coarse tuning and (b) fine tuning of the PGA

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Fig. 7.  AFT circuit

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Fig. 8.  The schematic of the bandwidth selection (BWS)

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Fig. 9.  The schematic of the oscillator

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Fig. 10.  An example of the AFT process

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Fig. 11.  Simulation results of (a) AFT circuit in time domain and (b) main filter in frequency domain

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Fig. 12.  DCOC circuit

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Fig. 13.  Simulated DCOC procedure

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Fig. 14.  Microphotograph of the baseband chain

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Fig. 15.  The channel bandwidth before and after AFT

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Fig. 16.  Measured and simulated frequency responsefor the gain range at bandwidth of 10 MHz

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Fig. 17.  Measured out-of-band IIP2 ($f_{1}$ = 100 MHz, $f_{2}$ = 105 MHz) of the baseband chain under voltage gain of 55.5 dB and the bandwidth of 10 MHz

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Fig. 18.  Measured out-of-band IIP3($f_{1}$ = 100 MHz, $f_{2}$ = 195 MHz) of the baseband chain under voltage gain of 55.5 dB and the bandwidth of 10 MHz

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Fig. 19.  Output noise level versus frequency at 55.5 dB gain level

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Table 1.   The specifications of the baseband chain

Table 2.   The cut-off frequency of LPF distribution

Table 3.   Performance summary and comparison
[1]
Santo A S, Giovanni G, Tino C, et al. A Ku-band monolithic receiver for DVB-S applications. IEEE Commun Mag, 2004:132
[2]
Kuo M C, Kao S W, Chen C H, et al. A 1.2 V 114 mW dual-band direct-conversion DVB-H tuner in 0.13μm CMOS. IEEE J Solid-State Circuits, 2009, 44(3):745
[3]
Yang Z, Wen G J, Feng X. A 2.5-V 56-mW baseband chain in a multistandard TV tuner for mobile and media application. Journal of Semiconductors, 2011, 32(3):035003 doi: 10.1088/1674-4926/32/3/035003
[4]
Shin H, Kim Y. A CMOS active-RC low-pass filter with simultaneously tunable high-and low-cutoff frequency for IEEE 802.22 applications. IEEE Trans Circuits Syst Ⅱ, 2010, 57(2):85 doi: 10.1109/TCSII.2009.2037994
[5]
Lee T C, Sun C P. Analog baseband circuits for WCDMA direct-conversion receivers. Bulletin of the College of Engineering, N. T. U., 2005, 93:23
[6]
Iason V, Kostis V, Nikos H, et al. A 65 nm CMOS multistandard, multiband TV tuner for mobile and multimedia applications. IEEE J Solid-State Circuits, 2008, 43(7):1522 doi: 10.1109/JSSC.2008.923721
[7]
Shin H Y, Kuo C N, Chen W H, et al. A 250 MHz 14 dB-NF 73 dB-gain 82 dB-DR analog baseband chain with digital-assisted DC-offset calibration for ultra-wideband. IEEE J Solid-State Circuits, 2010, 45(2):338 doi: 10.1109/JSSC.2009.2036320
[8]
Dufrene K, Boos Z, Weigel R. Digital adaptive ⅡP2 calibration scheme for CMOS down conversion mixers. IEEE J Solid-State Circuits, 2008, 43(11):2434 doi: 10.1109/JSSC.2008.2005453
[9]
Xie R Z, Chen J, Li W N, et al. A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers. IEEE 9th International Conference on ASIC, 2011:1058
[10]
Amico S, Conta M, Baschirotto A. A 4.1 mW 79 dB-DR 4th-order source-follower-based continuous-time filter for WLAN receivers. ISSCC Dig Tech Papers, 2006:352
[11]
Liao Y C, Tang Z W, Min H. A CMOS wide-band low-noise amplifier with balun-based noise-canceling technique. IEEE ASSCC, 2007:91
[12]
Vasilopoulos A, Vitzilaios G. A low-power wideband reconfigurable integrated active-RC filter with 73 dB SFDR. IEEE J Solid-State Circuits, 2006, 41(9):1997 doi: 10.1109/JSSC.2006.880616
[13]
Zhou J, Li W, Huang D P, et al. Dual-mode VCO based low-power synthesizer with optimized atomatic frequency calibration for software-defined radio. Proc ICASC, 2010:1145
[14]
Huang D P, Li W, Zhou J, et al. A frequency synthesizer with optimally coupled QVCO and harmonic-rejection SSB mixer for multi-standard wireless receiver. IEEE J Solid-State Circuits, 2011, 46(6):1307 doi: 10.1109/JSSC.2011.2124970
[15]
Kitsunezuka M, Hori S, Maeda T. A widely-tunable, reconfigurable CMOS analog baseband IC for software-defined radio. IEEE J Solid-State Circuits, 2009, 44(9):2496 doi: 10.1109/JSSC.2009.2023275

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    Received: 24 August 2012 Revised: 20 January 2013 Online: Published: 01 June 2013

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      Article Navigation >  Journal of Semiconductors  > 2013  >  34(6): 065009
      Songting Li, Jiancheng Li, Xiaochen Gu, Hongyi Wang. A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications[J]. Journal of Semiconductors, 2013, 34(6): 065009. doi: 10.1088/1674-4926/34/6/065009 ****S T Li, J C Li, X C Gu, H Y Wang. A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications[J]. J. Semicond., 2013, 34(6): 065009. doi: 10.1088/1674-4926/34/6/065009.
      Citation:
      Songting Li, Jiancheng Li, Xiaochen Gu, Hongyi Wang. A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications[J]. Journal of Semiconductors, 2013, 34(6): 065009. doi: 10.1088/1674-4926/34/6/065009 ****
      S T Li, J C Li, X C Gu, H Y Wang. A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications[J]. J. Semicond., 2013, 34(6): 065009. doi: 10.1088/1674-4926/34/6/065009.
      shu

      A continuously and widely tunable analog baseband chain with digital-assisted calibration for multi-standard DBS applications

      DOI: 10.1088/1674-4926/34/6/065009

      • School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China

      Funds:

      the National Natural Science Foundation of China 51072171

      the National Natural Science Foundation of China 61176093

      Project supported by the National Natural Science Foundation of China (Nos. 61176093, 51072171)

      More Information
      • Corresponding author: Li Jiancheng, Email:lijc@nudt.edu.cnb
      • Received Date: 2012-08-24
      • Revised Date: 2013-01-20
      • Published Date: 2013-06-01

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