High Resolution and Linearity Enhanced SAR ADC for Wearable Sensing Systems

Fan, H., Heidari, H. , Maloberti, F., Li, D., Hu, D. and Cen, Y. (2017) High Resolution and Linearity Enhanced SAR ADC for Wearable Sensing Systems. In: IEEE International Symposium on Circuits and Systems (ISCAS), Baltimore, MD, USA, 28-31 May 2017, ISBN 9781467368537

Abstract

This paper presents linearity enhancement capacitor re-configuring technique to improve the Spurious Free Dynamic Range (SFDR) and Signal-to-Noise-and-Distortion Ratio (SNDR) of ADC simultaneously without sacrificing the sampling rate in a 14-bit successive approximation register (SAR) analog-to-digital converter (ADC) for wearable electronics application. Behavioural Monte-Carlo simulations are presented to demonstrate the effect of the proposed method where no complex least-mean-square (LMS) algorithm or auxiliary calibration DAC needed. Simulation results show that with a mismatch error typical of modern technology, the SFDR is enhanced by about 18 dB and the SNDR is 15 dB better with the proposed technique for a 14-bit SAR ADC, which makes it suitable for accurate and linear smart sensor nodes in wearable sensing systems.

• Item Type: Conference Proceedings
• Additional Information: This work was supported by the National Natural Science Foundation of China (NSFC) under Grant 61401066 and the Fundamental Research Funds for the Central Universities under Grant ZYGX2014J029 as well as supported by a scholarship from the China Scholarship Council (CSC).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Heidari, Professor Hadi
• Authors: Fan, H., Heidari, H., Maloberti, F., Li, D., Hu, D., and Cen, Y.
• Subjects: T Technology > T Technology (General)
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISSN: 2379-447X
• ISBN: 9781467368537
• Published Online: 28 September 2017

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