Image: IEEE Journal of Solid-State Circuits
Abstract:This paper presents a sub-radix-2 redundant architecture to improve the performance of switched-capacitor successive-approximation-register (SAR) analog-to-digital converters (ADCs). The redundancy not only guarantees digitally correctable static nonlinearities of the converter, it also offers means to combat dynamic errors in the conversion process, and thus, accelerating the speed of the SAR architecture. A perturbation-based digital calibration technique is also described that closely couples with the architecture choice to accomplish simultaneous identification of multiple capacitor mismatch errors of the ADC, enabling the downsizing of all sampling capacitors to save power and silicon area. A 12-bit prototype measured a Nyquist 70.1-dB signal-to-noise-plus-distortion ratio (SNDR) and a Nyquist 90.3-dB spurious free dynamic range (SFDR) at 22.5 MS/s, while dissipating 3.0-mW power from a 1.2-V supply and occupying 0.06-mm2 silicon area in a 0.13-μm CMOS process. The figure of merit (FoM) of this ADC is 51.3 fJ/step measured at 22.5 MS/s and 36.7 fJ/step at 45 MS/s.
Davidson Auditorium, The University of Texas at Dallas
As electronics continue to bridge the gap between the analog real world and digital information infrastructure, the entire $350 billion per year integrated circuits industry is evolving into an analog-digital mixed signal industry. This one-day symposium will examine trends, emerging opportunities and key challenges in analog integrated circuits and systems, as well as related technologies.
The list of speakers will include:
Hans Stork — Senior Vice President and CTO of ON Semiconductor
Alessandro Piovaccari — Senior Vice President of Engineering and CTO, Silicon Labs
Brian La Cour — Director, Center for Quantum Research, ARL, UT Austin
Mike Flynn — Professor, U Michigan, Leader of Fund. Analog Thrust, TxACE
Yiorgos Makris — Professor, UT Dallas
Fredrick A. Jenet — Associate Professor of Physics, UT Rio Grande Valley
Adrian Tang — Strategic Researcher, UCLA and NASA JPL
The symposium will feature presentations by leading analog researchers, a lunch program, and poster and demonstration sessions featuring TxACE research.