Design methodology for power-efficient SC delta-sigma modulators based on switched-VMAs

In this work a new design methodology for the low-power design of switched-capacitors delta-sigma modulators using the recently introduced switched-variable-mirror amplifiers (SVMAs) is presented. The effectiveness of the methodology is demonstrated for a third-order single-loop single-bit delta-sigma modulator employing SVMAs designed in a standard 0.18 μm CMOS technology. Results show that the proposed methodology allows for the design of state-of-the-art high-resolution ADCs while greatly boosting design cycles by removing the need for time consuming full electrical simulations.

[1]  Andrea Baschirotto,et al.  Behavioral modeling of switched-capacitor sigma-delta modulators , 2003 .

[2]  Ramón González Carvajal,et al.  A free but efficient low-voltage class-AB two-stage operational amplifier , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[3]  Ángel Rodríguez-Vázquez,et al.  A SIMULINK-based approach for fast and precise simulation of switched-capacitor, switched-current and continuous-time /spl Sigma//spl Delta/ modulators , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[4]  Franco Maloberti,et al.  An high-swing, 1.8 V, push-pull opamp for sigma-delta modulators , 1998, 1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology (Cat. No.98EX196).

[5]  Georges G. E. Gielen,et al.  A high-level simulation and synthesis environment for /spl Delta//spl Sigma/ modulators , 2003, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..

[6]  Gabor C. Temes,et al.  The Delta¿¿¿Sigma Toolbox , 2017 .

[7]  Chris Van Hoof,et al.  A Power-Optimal Design Methodology for High-Resolution Low-Bandwidth SC $\Delta\Sigma$ Modulators , 2012, IEEE Transactions on Instrumentation and Measurement.

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

[9]  Denis C. Daly,et al.  Through the Looking Glass -- The 2017 Edition: Trends in Solid-State Circuits from ISSCC , 2017, IEEE Solid-State Circuits Magazine.

[10]  Francisco Serra-Graells,et al.  Class-AB single-stage OpAmp for low-power switched-capacitor circuits , 2015, 2015 IEEE International Symposium on Circuits and Systems (ISCAS).

[11]  Michiel Steyaert,et al.  Switched-opamp: an approach to realize full CMOS switched-capacitor circuits at very low power supply voltages , 1994, IEEE J. Solid State Circuits.

[12]  Mohammad Yavari.  Single-stage class AB operational amplifier for SC circuits , 2010 .

[13]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[14]  Sergio Callegari,et al.  Teaching ΔΣ modulators with PyDSM and scientific Python , 2015, 2015 IEEE International Symposium on Circuits and Systems (ISCAS).

[15]  Ángel Rodríguez-Vázquez,et al.  Top-Down Design of High-Performance Sigma-Delta Modulators , 1998 .