Multirate Formulation for Mismatch Sensitivity Analysis of Analog-to-Digital Converters That Utilize Parallel -Modulators

A general formulation based on multirate filterbank theory for analog-to-digital converters using parallel sigmadelta modulators in conjunction with modulation sequences is presented. The time-interleaved modulators (TIMs), Hadamard modulators (HMs), and frequency-band decomposition modulators (FBDMs) can be viewed as special cases of the proposed description. The usefulness of the formulation stems from its ability to analyze a system's sensitivity to aliasing due to channel mismatch and modulation sequence level errors. Both Nyquist-rate and oversampled systems are considered, and it is shown how the matching requirements between channels can be reduced for oversampled systems. The new formulation is useful also for the derivation of new modulation schemes, and an example is given of how it can be used in this context.

[1]  Ian Galton,et al.  Delta-Sigma modulator based A/D conversion without oversampling , 1995 .

[3]  David A. Johns,et al.  Mismatch effects in time-interleaved oversampling converters , 1994, Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94.

[4]  I. Kale,et al.  Efficient architectures for time-interleaved oversampling delta-sigma converters , 2000 .

[5]  Roberto H. Bamberger,et al.  Combining subband decomposition and sigma delta modulation for wideband A/D conversion , 1994, Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94.

[6]  Jean-François Naviner,et al.  Analysis of time-interleaved delta-sigma analog to digital converter , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[7]  L.J. Breems,et al.  A cascaded continuous-time /spl Sigma//spl Delta/ modulator with 67dB dynamic range in 10MHz bandwidth , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).

[8]  Antonio Torralba,et al.  Time-interleaved multirate sigma-delta modulators , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[9]  Robert Bregovic,et al.  Multirate Systems and Filter Banks , 2002 .

[10]  Ian Galton,et al.  Oversampling parallel delta-sigma modulator A/D conversion , 1996 .

[11]  R. Schreier,et al.  Delta-sigma data converters : theory, design, and simulation , 1997 .

[12]  David A. Johns,et al.  27.6 A 43mW CT Complex ∆Σ ADC with 23MHz of Signal Bandwidth and 68.8dB SNDR , 2005 .

[13]  A. Eshraghi,et al.  A time-interleaved parallel /spl Delta//spl Sigma/ A/D converter , 2003 .

[14]  Terri S. Fiez,et al.  A comparative analysis of parallel delta-sigma ADC architectures , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[15]  Terri S. Fiez,et al.  Calibration of parallel /spl Delta//spl Sigma/ ADCs , 2002 .

[16]  G. Ding,et al.  Frequency-interleaving technique for high-speed A/D conversion , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[17]  David A. Johns,et al.  Time-interleaved oversampling convertors , 1993 .

[18]  David A. Johns,et al.  Time-interleaved oversampling A/D converters: theory and practice , 1997 .

[19]  Håkan Johansson,et al.  A General Formulation of Analog-to-Digital Converters Using Parallel Sigma-Delta Modulators and Modulation Sequences , 2006, APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems.

[20]  Ian Galton,et al.  Parallel delta-sigma A/D conversion , 1994, Proceedings of IEEE Custom Integrated Circuits Conference - CICC '94.