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Survey of the State of the Art Analog Front End Circuit Techniques for ADSL

  • C. Dru Cabler

Abstract

In the last several years, there has been increasing demand by consumers and small businesses for higher speed connectivity to the Internet. ADSL promises to fulfill the demand for faster data rates. However, in order to achieve the highest data rates for a given line, careful consideration must be given to the analog front end design such that it does not become the limiting factor. Based on recent publications, the fundamental techniques for building analog front ends are explored. Possibilities for future advancements in analog front ends are addressed in the conclusion.

Keywords

Solid State Circuit Transmitter Path Programmable Gain Amplifier Programmable Gain Auxiliary Circuit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    Chang, Z.Y., et al. “A CMOS Analog Front-End Circuit for an FDMBased ADSL System,” IEEE J. Solid-State Circuits, vol. 30, no. 12, pp. 1449–1456, Dec. 1995.CrossRefGoogle Scholar
  2. [2]
    Durham, A.M. and Redham-White, W., “Integrated continuous-time balanced filter for 16-bit DSP interfaces,” IEEE J. Solid-State Circuits, vol. 28, pp. 835–839, Jul. 1993.CrossRefGoogle Scholar
  3. [3]
    Yin, G. and Sansen, W., “A high frequency and high resolution fourth order Sigma Delta A/D converter in BiCMOS technology,” IEEE J. Solid-State Circuits, vol. 29, pp 857–865, Aug. 1994.CrossRefGoogle Scholar
  4. [4]
    Cabler, C.D, “Fourth-Order Cascaded Sigma-Delta Modulator”, US Patent 5414–424.Google Scholar
  5. [5]
    Ritoniemi, T., et al., “The design of stable high order 1-bit sigma-delta modulators,” Proc. IEEE ISCAS, 1990, pp. 3267–3270.Google Scholar
  6. [6]
    Lee, W.L., and Sodini, C.G., “A topology for high order interpolative coders,” Proc. IEEE ICCAS, 1987, pp. 459–462.Google Scholar
  7. [7]
    Analog Devices, Inc. “AD6437, Analog Front End for ADSL”.Google Scholar
  8. [8]
    Lanford, D.S, et al., “A BiCMOS Analog Front-End Circuit for an FDM-Based ADSL System,” IEEE J. Solid State Circuits, vol. 33, no. 9, Sep. 1998, pp. 1383–1393.CrossRefGoogle Scholar
  9. [9]
    Tesch, B.J. and Garcia, J.C., “A low glitch 14 bit 100Mhz D/A converter,” IEEE J. Solid State Circuits, vol. 32, Sep. 1997, pp. 1465–1469.CrossRefGoogle Scholar
  10. [10]
    Cornil, J.P., et al., “CODEC for Echo-Cancelling, Full-Rate ADSL Modems,” ISSCC Digest of Technical Papers, San Francisco, CA, Feb. 1999, pp. 242–243.Google Scholar
  11. [11]
    Conroy, C., et al., “A CMOS Analog Front-End IC for DMT ADSL,” ISSCC Digest of Technical Papers, San Francisco, CA, Feb. 1999, pp. 240–241.Google Scholar
  12. [12]
    Hester, R., et al., “CODEC for Echo-Canceling, Full-Rate ADSL Modems,” ISSCC Digest of Technical Papers, San Francisco, CA, Feb. 1999, pp. 242–243.Google Scholar
  13. [13]
    Lewis, S., et al., “A 10-b 20Msample/s Analog-to-Digital Converter,” IEEE J. S.lid State Circuits, vol. 27, No. 3, March, 1992, pp. 351–358.CrossRefGoogle Scholar
  14. [14]
    Baird, R.T. and Fiez, T., “Linearity Enhancement of Mutability SD A/D and D/A Converters Using DWA,” IEEE Transactions on Circuits and Systems, Vol. 42, No. 12, Dec. 1995, pp. 753–762.CrossRefGoogle Scholar
  15. [15]
    van der Zwan, E.J., et al., “A 13mW 500kHz Data Acquisition IC with a 4.5 Digit DC and 0.02% Accurate True-RMS Extraction,”, ISSCC Digest of Technical Papers, San Francisco, CA, Feb. 1999, pp. 398–399.Google Scholar
  16. [16]
    Moyal, M. et al., “A 25kft 768kb/s CMOS Transceiver for Multiple Bit-Rate DSL”, ISSCC Digest of Technical Papers, San Francisco, CA, Feb. 1999, pp. 398–399.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • C. Dru Cabler
    • 1
  1. 1.Communication Products DivisionAdvanced Micro DevicesDresdenGermany

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