1V Δ∑ A/D Converters

  • V. Peluso
  • M. Steyaert
  • W. Sansen

Abstract

A design approach for 1V Switched Capacitor Δ∑ modulators is presented. The chosen method of implementation is the Switched Opamp Technique, which is shortly revisited. Dedicated low voltage circuit blocks including a class AB OTA and comparater are treated. A rearranged Δ∑ modulator topology with half delay integrators is discussed. The influence of very low supply voltage on power consumption is illustrated. Measurement results of a 900m V Δ∑ modulator with 77dB Dynamic Range are discussed.

Keywords

Current Mirror Input Stage Modulator Topology Switch Capacitor Supply Node 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [Bas 94]
    A. Baschirotto, R. Castello, and F. Montecchi, “Design strategy for low-voltage SC circuits”, Electronics Letters, vol. 30, no. 5, pp. 378–379, Mar. 1994.CrossRefGoogle Scholar
  2. [Bas 97a]
    A. Baschirotto and R. Castello, “A 1V 1.8MHz CMOS Switched-Opamp SC filter with rail-to-rail output swing”, in Proceeding International Solid-State Circuits Conference, Feb. 1997, pp. 58-56.Google Scholar
  3. [Bas 97b]
    A. Baschirotto and R. Castello, “A 1V CMOS fully-differential Switched-Opamp bandpass ∑Δ modulator”, in Proceedings of the 23rd European Solid-State Circuits Conference, Sept. 1997, pp. 152-155.Google Scholar
  4. [Cra 95]
    S. Crapanzano and D. A. Johns, “2V fully-differential SC integrator in standard CMOS”, Electronics Letters, vol. 31, no. 23, pp. 1995–1996, Nov. 1995.CrossRefGoogle Scholar
  5. [Cro 94]
    J. Crols and M. Steyaert, “Switched-Opamp: An approach to realize full CMOS switched-capacitor filters at very low power supply”, IEEE Journal of S olid-State Circuits, vol. 29, no. 8, pp. 936–942, Aug. 1994.CrossRefGoogle Scholar
  6. [Mar 98]
    A. Marques, V. Peluso, M. Steyaert, and W. Sansen, “Bandwidth-resolution-power trade-off in ∑Δ analog to digital converters”, Tech. Rep., K.u. Leuven, 1997.Google Scholar
  7. [Pel 97a]
    V. Peluso, M. Steyaert, and W. Sansen, “A Switched Opamp 1.5V-100μW ∑Δ modulator with 12 bits dynamic range.”, in Proceedings of the 22nd European Solid-State Circuits Conference, Neuchâtel Switzerland, Sept. 1996, pp. 256-259.Google Scholar
  8. [Pel 97b]
    V. Peluso, M. Steyaert, and W. Sansen, “A 1.5V-100μ W ∑Δ modulator with 12-b dynamic range using the Switched-Opamp technique.”, IEEE Journal of S olid-State Circuits, vol. 32, no. 7, pp. 943–952, July 1997.CrossRefGoogle Scholar
  9. [Pel 98]
    V. Peluso, P. Vancorenland, A. Marques, M. Steyaert, and W. Sansen, “A 900 m V — 40 μW ∑Δ modulator with 77dB dynamic range”, in Proceeding International Solid-State Circuits Conference, SF, Feb. 1998.Google Scholar
  10. [Ste 93]
    M. Steyaert, J. Crols, and S. Gogaert, “Switched-Opamp, a technique for realising full CMOS switched-capacitor filters at very low voltages”, in Proceedings of the 19th European Solid-State Circuits Conference, Sept. 1993, pp. 178-181.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • V. Peluso
    • 1
  • M. Steyaert
    • 1
  • W. Sansen
    • 1
  1. 1.ESAT-MICAS Katholieke Universiteit LeuvenLeuvenBelgium

Personalised recommendations