SEMICONDUCTOR INTEGRATED CIRCUITS

A 410 μW, 70 dB SNR high performance analog front-end for portable audio application

Lan Dai, Wenkai Liu and Yan Lu

+ Author Affiliations

 Corresponding author: Dai Lan, Email:perfect_dai@163.com

PDF

Abstract: This paper describes an analog front-end (AFE) intended for portable audio application, which operates at 1 V and consumes only 410 μW. The AFE consists of a 30 dB-gain programmable gain amplifier (PGA) and a 2nd-order 3-bit sigma-delta modulator. The PGA with single input and on-chip common-mode bias voltage shows good noise-reduction performance. The modulator makes use of data weighted averaging to reduce the linearity requirements of the digital-to-analog converter in the feedback loop. The AFE is implemented in the SMIC 0.13 μm 1P8M CMOS process. The measurement results show that in a 1 V power supply, at 200 mVp-p, between 100 Hz and 20 kHz, the maximal signal-to-noise ratio is 70 dB, and the total power is 410 μW.

Key words: analog front-endlow powerPGAmodulator



[1]
Marques A, Peluso V, Steyaert M, et al. Optimal parameters for sigma-delta modulator topologies. IEEE Trans Circuit Syst, 1998, 45:1232 doi: 10.1109/82.718590
[2]
Geert Y, Steyaert M, Sansenl W. A high-performance multibit sigma-delta CMOS ADC. IEEE J Solid-State Circuits, 2000, 35(12):1829 doi: 10.1109/4.890296
[3]
Silva M J, Solis B S, Schellenberg M. A CMOS hearing aid device. Analog Integrated Circuit and Signal Processing, 1999, 21(2):163 doi: 10.1023/A:1008373824380
[4]
Graells F, Gomez L, Huertas J. A true-1-V 300-μW CMOS-subthreshold log-dommain hearing-aid-on-chip. IEEE J Solid-State Circuits, 2004, 39(8):1271 doi: 10.1109/JSSC.2004.831469
[5]
Wayne D, Rives M, Huynh T, et al. A single-chip hearing aid with one volt switched-capacitor filters. Proc IEEE Custom Integrated Circuits Conf, May 1992: 751
[6]
Nerteboom H, Janssens M A E, Leenen J R G M, et al. A single battery 0.9 V-operated digital sound processing IC including AD/DA and IR receiver with 2 mW power consumption. IEEE Int Solid-State Circuit Conf Dig Tech Paper, 1997:98
[7]
Miller M, Petriel C. A multibit sigma-delta ADC for multimode receivers. IEEE J Solid-State Circuits, 2003, 38(3):475 doi: 10.1109/JSSC.2002.808321
[8]
Kim S, Lee J Y, Song S J, et al. An energy-efficient analog front-end circuit for a sub-1 V digital hearing aid. IEEE J Solid-State Circuits, 2006, 41(4):876 doi: 10.1109/JSSC.2006.870798
[9]
Gata D, Sjursen W, Hochschild J, et al. A 1.1-V 270-μA mixed-signal hearing aid chip. IEEE J Solid-State Circuits, 2002, 37(12):1670 doi: 10.1109/JSSC.2002.804328
[10]
Kim S Y, Cho N J, Song S J, et al. A 0.9 V 96μW fully operational digital hearing aid chip. IEEE J Solid-State Circuits, 2007, 42(11):2432 doi: 10.1109/JSSC.2007.907198
[11]
Sukumaran A, Karanjkar K, Jhanwar S, et al. A 1.2 V 285μA analog front end chip for a digital hearing aid in 0.13μm CMOS. Proceedings of the IEEE Asian Solid-State Circuits Conference, 2013:397
Fig. 1.  Block diagram of AFE

Fig. 2.  OTA circuit of PGA

Fig. 3.  Block diagram of the 2nd-order 3 bit sigma-delta modulator

Fig. 4.  Structure of OTA and SC-CMFB of sigma-delta modulator

Fig. 5.  Comparator circuit

Fig. 6.  DWA element selection for a 3-bit DAC

Fig. 7.  DWA circuit

Fig. 8.  Chip of AFE

Fig. 9.  Spectrum of AFE output signal

Fig. 10.  Measured SNR versus input amplitude of analog front-end

Table 1.   Performance summary of AFE

Table 2.   Performance comparison of analog front-end

[1]
Marques A, Peluso V, Steyaert M, et al. Optimal parameters for sigma-delta modulator topologies. IEEE Trans Circuit Syst, 1998, 45:1232 doi: 10.1109/82.718590
[2]
Geert Y, Steyaert M, Sansenl W. A high-performance multibit sigma-delta CMOS ADC. IEEE J Solid-State Circuits, 2000, 35(12):1829 doi: 10.1109/4.890296
[3]
Silva M J, Solis B S, Schellenberg M. A CMOS hearing aid device. Analog Integrated Circuit and Signal Processing, 1999, 21(2):163 doi: 10.1023/A:1008373824380
[4]
Graells F, Gomez L, Huertas J. A true-1-V 300-μW CMOS-subthreshold log-dommain hearing-aid-on-chip. IEEE J Solid-State Circuits, 2004, 39(8):1271 doi: 10.1109/JSSC.2004.831469
[5]
Wayne D, Rives M, Huynh T, et al. A single-chip hearing aid with one volt switched-capacitor filters. Proc IEEE Custom Integrated Circuits Conf, May 1992: 751
[6]
Nerteboom H, Janssens M A E, Leenen J R G M, et al. A single battery 0.9 V-operated digital sound processing IC including AD/DA and IR receiver with 2 mW power consumption. IEEE Int Solid-State Circuit Conf Dig Tech Paper, 1997:98
[7]
Miller M, Petriel C. A multibit sigma-delta ADC for multimode receivers. IEEE J Solid-State Circuits, 2003, 38(3):475 doi: 10.1109/JSSC.2002.808321
[8]
Kim S, Lee J Y, Song S J, et al. An energy-efficient analog front-end circuit for a sub-1 V digital hearing aid. IEEE J Solid-State Circuits, 2006, 41(4):876 doi: 10.1109/JSSC.2006.870798
[9]
Gata D, Sjursen W, Hochschild J, et al. A 1.1-V 270-μA mixed-signal hearing aid chip. IEEE J Solid-State Circuits, 2002, 37(12):1670 doi: 10.1109/JSSC.2002.804328
[10]
Kim S Y, Cho N J, Song S J, et al. A 0.9 V 96μW fully operational digital hearing aid chip. IEEE J Solid-State Circuits, 2007, 42(11):2432 doi: 10.1109/JSSC.2007.907198
[11]
Sukumaran A, Karanjkar K, Jhanwar S, et al. A 1.2 V 285μA analog front end chip for a digital hearing aid in 0.13μm CMOS. Proceedings of the IEEE Asian Solid-State Circuits Conference, 2013:397
  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 2608 Times PDF downloads: 16 Times Cited by: 0 Times

    History

    Received: 15 April 2014 Revised: 08 May 2014 Online: Published: 01 October 2014

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Lan Dai, Wenkai Liu, Yan Lu. A 410 μW, 70 dB SNR high performance analog front-end for portable audio application[J]. Journal of Semiconductors, 2014, 35(10): 105013. doi: 10.1088/1674-4926/35/10/105013 L Dai, W K Liu, Y Lu. A 410 μW, 70 dB SNR high performance analog front-end for portable audio application[J]. J. Semicond., 2014, 35(10): 105013. doi: 10.1088/1674-4926/35/10/105013.Export: BibTex EndNote
      Citation:
      Lan Dai, Wenkai Liu, Yan Lu. A 410 μW, 70 dB SNR high performance analog front-end for portable audio application[J]. Journal of Semiconductors, 2014, 35(10): 105013. doi: 10.1088/1674-4926/35/10/105013

      L Dai, W K Liu, Y Lu. A 410 μW, 70 dB SNR high performance analog front-end for portable audio application[J]. J. Semicond., 2014, 35(10): 105013. doi: 10.1088/1674-4926/35/10/105013.
      Export: BibTex EndNote

      A 410 μW, 70 dB SNR high performance analog front-end for portable audio application

      doi: 10.1088/1674-4926/35/10/105013
      Funds:

      the National Natural Science Foundation of China 61001052

      the Beijing Natural Science Foundation 4123096

      Project supported by the National Natural Science Foundation of China (No. 61001052) and the Beijing Natural Science Foundation (No. 4123096)

      More Information
      • Corresponding author: Dai Lan, Email:perfect_dai@163.com
      • Received Date: 2014-04-15
      • Revised Date: 2014-05-08
      • Published Date: 2014-10-01

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return