A First-Order Noise-Shaping SAR ADC

First-Order Fully-passive Noise-Shaping SAR ADC

  • Young Gyun Oh Kookmin University
  • Hyung Il Chae Konkuk University
DOI: https://doi.org/10.23075/jicas.2020.6.3.003
Keywords: Analog-to-Digital Converter(ADC), Noise Shaping(NS), Successive Approximation register(SAR)

Abstract

This paper presents a first-order noise shaping successive approximation register (NS-SAR) ADC with a passive residue filter. To reduce circuit complexity and increase power efficiency, the proposed NS-SAR ADC architecture uses a first-order passive integrator based on charge sharing. The attenuation coming from the charge sharing is compensated by comparator gain and first-order noise shaping is achieved totally in a passive manner, which is less sensitive to PVT variation than conventional architectures using dynamic amplifiers. In a 65-nm CMOS process, the prototype occupies 0.013 mm2 area and consumes only 0.5 mW at sampling frequency of 150-MHz. The prototype achieves the maximum SNDR of 68 dB with oversampling ratio (OSR) of 4 and the peak value of 172.3 dB Schreier FoM (FoMS).

Author Biographies

Young Gyun Oh, Kookmin University

Young Gyun Oh received the B.S. degree in electronic engineering from Kookmin University, Seoul, Korea, in 2019. He is currently working toward the M.S. degree in electrical engineering at Kookmin University. His research during the M.S. course has focused on analog to digital converter.

Hyung Il Chae, Konkuk University

Hyung Il Chae received his B.S. degree in electrical engineering from Seoul National University, Seoul, Korea, in 2004, and his M.S. and Ph.D. degrees in electrical engineering from the University of Michigan, Ann Arbor, MI, USA, in 2009 and 2013, respectively. From 2013 to 2015, he was a senior engineer at Qualcomm Atheros, San Jose, CA, USA. From 2015 to 2019, he was a associate professor at Kookmin University, Seoul, South Korea. He joined Konkuk University, Seoul, South Korea, in 2019, and is currently an associate professor. His research interests include mixed signal and RF circuit design. Dr. Chae is the recipient of a KFAS Fellowship.

Homepage : https://sites.google.com/view/kucsdl

Published
2020-07-01
How to Cite
Oh, Y. G., & Chae, H. I. (2020). A First-Order Noise-Shaping SAR ADC. Journal of Integrated Circuits and Systems, 6(3), 12-19. https://doi.org/10.23075/jicas.2020.6.3.003
Issue
Vol 6 No 3 (2020)
Section
Articles

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