MINLP based topology synthesis for delta sigma modulators optimized for signal path complexity, sensitivity and power consumption

The paper proposes a novel architecture synthesis algorithm for single-loop single-bit /spl Delta//spl Sigma/ modulators. We defined a generic modulator architecture and derived its noise and signal transfer function (NTF/STF) in symbolic forms. We then used the TF in MINLP (mixed integer nonlinearly constrained programming) to generate optimal topologies for a variety of design requirements, such as modulator complexity, sensitivity and power consumption, which appeared as cost functions. Experiments show the superiority of the synthesized topologies as compared to traditional solutions.

[1]  Michel Steyaert,et al.  Optimal parameters for /spl Delta//spl Sigma/ modulator topologies , 1998 .

[2]  Georges G. E. Gielen,et al.  Systematic design exploration of delta-sigma ADCs , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[3]  D. B. Ribner,et al.  A comparison of modulator networks for high-order oversampled Sigma Delta analog-to-digital converters , 1991 .

[4]  Tai-Haur Kuo,et al.  Automatic coefficients design for high-order sigma-delta modulators , 1999 .

[5]  Rob A. Rutenbar,et al.  ComputerAided Design of Analog and MixedSignal Integrated Circuits , 2002 .

[6]  Brian A. A. Antao,et al.  ARCHGEN: Automated synthesis of analog systems , 1995, IEEE Trans. Very Large Scale Integr. Syst..

[7]  K. Francken,et al.  DAISY: a simulation-based high-level synthesis tool for /spl Delta//spl Sigma/ modulators , 2000, IEEE/ACM International Conference on Computer Aided Design. ICCAD - 2000. IEEE/ACM Digest of Technical Papers (Cat. No.00CH37140).

[8]  Alex Doboli,et al.  Towards High-Level Synthesis of Analog and Mixed-Signal Systems from VHDL-AMS Specifications , 2003, FDL.

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

[10]  Rob A. Rutenbar,et al.  Computer-aided design of analog and mixed-signal integrated circuits , 2000, Proceedings of the IEEE.

[11]  G. Fischer,et al.  Alternative topologies for sigma-delta modulators-a comparative study , 1997 .

[12]  Alex Doboli,et al.  Exploration-based high-level synthesis of linear analog systems operating at low/medium frequencies , 2003, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..

[13]  M. Hershenson,et al.  Behavioral Modeling for High-Level Synthesis of Analog and Mixed-Signal Systems from VHDL-AMS , 2002 .

[14]  Georges G. E. Gielen,et al.  DAISY: A Simulation-Based High-Level Synthesis Tool for Delta-Sigma Modulators , 2000, ICCAD.