The University Lecture on “When SAR meets ∆∑ – Hybridization of SAR and ∆∑ ADCs” will take place as follows:
Date: 7 December 2018 (Thursday)
Time: 10:00am – 12:00pm
Venue: N21-G013, Lecture Hall, Research Building, University of Macau
The speaker is:
Prof. Nan SUN, Associate Professor, University of Texas at Austin
The Lecture is:
When SAR meets ∆∑ – Hybridization of SAR and ∆∑ ADCs
Abstract:
SAR is widely used for medium resolution applications due to its simplicity, scaling compatibility, and low-power consumption. However, its power efficiency degrades as the resolution increases due to its tight requirement on the comparator noise and the exponentially growing capacitor DAC array. By contrast, ∆∑ ADC is a popular architecture for high-resolution applications. Taking advantage of noise shaping, it can achieve high resolution with a low-resolution quantizer and DAC. However, it typically requires the use of op-amps that are power hungry and scaling unfriendly.
This talk will present latest hybrid ADCs that aim to combine the merits of SAR and ∆∑ while simultaneously obviating their drawbacks. After providing a high-level review of published works, this talk will take a deep dive into two interesting noise-shaping SAR ADC architectures. The first one uses fully passive switched-capacitor filter to achieve 2nd-order noise shaping. It is fully dynamic and can be easily duty cycled. In addition, it is robust and calibration free. Thus, it is well suited for low-power sensor applications. The second one adopts an error-feedback structure, which simplifies the filter design. It consumes very low power by using a dynamic amplifier and address its process, voltage, and temperature (PVT) sensitivity via a fast-convergence background calibration loop.
Biography:
Nan SUN is Associate Professor at the University of Texas at Austin. He received the B.S. degree from Tsinghua University, China in 2006, where he ranked top in Department of Electronic Engineering. He received the Ph.D. degree from Harvard University in 2010. Dr. Sun received the NSF Career Award in 2013 and Jack Kilby Research Award from UT Austin in both 2015 and 2016. He holds the AMD Endowed Development Chair from 2013 to 2017. He serves in the TPC of IEEE Custom Integrated Circuits Conference and Asian Solid-State Circuit Conference. He is Associate Editor for IEEE Transactions on Circuits and Systems – I: Regular Papers, and Guest Editor for IEEE Journal of Solid-State Circuits.
For more details, kindly find the event poster, abstract and bio.