Advertisement

Tunable Mismatch Shaping for Quadrature Bandpass Delta-Sigma Data Converters

  • Waqas AkramEmail author
  • Earl E. SwartzlanderJr.
Article
  • 134 Downloads

Abstract

This paper presents an architecture for quadrature bandpass mismatch shaping that allows the center frequency of the mismatch suppression band to be tunable over the entire Nyquist range. The approach is based on the previously reported complex-valued tree-based mismatch shaper, and extends this to allow tunable operation. The proposed design has been implemented using VHDL and synthesized to logic gates. The hardware complexity and mismatch shaping performance of the proposed architecture are compared to that of a reference architecture, which uses separate tunable mismatch shapers for each complex component path. Simulation results show consistent mismatch shaping performance across the entire tuning range.

Keywords

Bandpass delta-sigma Quadrature delta-sigma Mismatch shaping Tunable delta-sigma DAC element matching Unit element DAC 

References

  1. 1.
    Akram, W., & Swartzlander Jr., E. E. (2003). Digital frequency synthesis using piece-wise polynomial interpolation. In 37th Asilomar Conference on Signals, Systems and Computers (pp. 2237–2241).Google Scholar
  2. 2.
    Akram, W., & Swartzlander Jr., E. E. (2009). Tunable N-path mismatch shaping for multibit bandpass delta-sigma modulators. In 43rd Asilomar Conference on Signals, Systems and Computers (pp. 1288–1291).Google Scholar
  3. 3.
    Akram, W., & Swartzlander Jr., E. E. (2010). Tunable mismatch shaping for quadrature bandpass delta-sigma data converters. In IEEE Workshop on Signal Processing Systems (pp. 198–203).Google Scholar
  4. 4.
    Akram, W., & Swartzlander, Jr. E. E. (2010). A novel technique for tunable mismatch shaping in oversampled digi tal-to-analog converters. In IEEE International Conference on Acoustics, Speech and Signal Processing (pp. 1534–1537).Google Scholar
  5. 5.
    Breems, L. J., Dijkmans, E. C., & Huijsing, J. H. (2001). A quadrature data-dependent DEM algorithm to improve image rejection of a complex sigma-delta modulator. IEEE Journal of Solid-State Circuits, 36, 1879–1886.CrossRefGoogle Scholar
  6. 6.
    Galton, I. (1997). Spectral shaping of circuit errors in digital-to-analog converters. IEEE Transactions on Circuits and Systems II, 44, 808–817.CrossRefGoogle Scholar
  7. 7.
    Galton, I. (2010). Why dynamic-element-matching DACs work. IEEE Transactions on Circuits and Systems II: Express Briefs, 57, 69–74.MathSciNetCrossRefGoogle Scholar
  8. 8.
    Jantzi, S. A., Martin, K. W., & Sedra, A. S. (1997). Quadrature bandpass delta-sigma modulation for digital radio. IEEE Journal of Solid-State Circuits, 32, 1935–1950.CrossRefGoogle Scholar
  9. 9.
    Jerng, A., & Sodini, C. G. (2007). A wideband ΔΣ digital-RF modulator for high data rate transmitters. IEEE Journal of Solid-State Circuits, 42, 1710–1722.CrossRefGoogle Scholar
  10. 10.
    Kaplan, T. S., Jensen, J. F., Fields, C. H., & Chang, M.-C. F. (2005). A 2-GS/s 3-bit ΔΣ-modulated DAC with tunable bandpass mismatch shaping. IEEE Journal of Solid-State Circuits, 40, 603–610.CrossRefGoogle Scholar
  11. 11.
    Luschas, S., Schreier, R., & Lee, H.-S. (2004). Radio frequency digital-to-analog converter. IEEE Journal of Solid-Sate Circuits, 39, 1462–1467.CrossRefGoogle Scholar
  12. 12.
    Miller, M., & Petrie, C. S. (2003). A multibit sigma-delta ADC for multimode receivers. IEEE Journal of Solid-State Circuits, 38, 475–482.CrossRefGoogle Scholar
  13. 13.
    Norsworthy, S. R., Schreier, R., & Temes, G. C. (1997). Delta-Sigma Data Converters. New York: IEEE Press.Google Scholar
  14. 14.
    Reekmans, S., De Maeyer, J., Rombouts, P., & Weyten, L. (2006). Quadrature mismatch shaping with a complex, tree structured DAC. In IEEE International Symposium on Circuits and Systems (pp. 2969–2972).Google Scholar
  15. 15.
    Reekmans, S., De Maeyer, J., Rombouts, P., & Weyten L. (2006). Quadrature mismatch shaping for digital-to-analog converters. IEEE Transactions on Circuits and Systems I: Regular Papers, 53, 2529–2538.CrossRefGoogle Scholar
  16. 16.
    Schreier, R. (2002). Quadrature mismatch-shaping. In IEEE International Symposium on Circuits and Systems (Vol. 4, pp. 675–678).Google Scholar
  17. 17.
    Schreier, R., & Zhang, B. (1995). Noise-shaped multibit D/A converter employing unit elements. Electronics Letters, 31, 1712–1713.CrossRefGoogle Scholar
  18. 18.
    Synopsys, Inc. (2010). Design-Compiler Ultra. http://www.synopsys.com.
  19. 19.
    Talaeie, S. M., Copani, T., Bakkaloglu, B., & Kiaei, S. (2006). A bandpass ΔΣ RF-DAC with embedded FIR reconstruction filter. IEEE International Solid-State Circuits Conference, 1, 578–579.Google Scholar
  20. 20.
    Vadipour, M. (2004). A bandpass mismatch noise-shaping technique for sigma-delta modulators. IEEE Transactions on Circuits and Systems II: Express Briefs, 51, 130–135.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringUniversity of Texas at AustinAustinUSA

Personalised recommendations