People

Xi Chen

Xi Chen joined NVIDIA's Circuits Research Group in January 2012. He received the B.S. and M.S. degrees from Zhejiang University in 2003 and 2006, respectively, and the PhD degree in electrical engineering from North Carolina State University in 2011. His recent projects and researches include circuits for high-speed low-power off-chip and on-chip signaling, noise and interference tolerant circuit designs, and new clock generation technique for high-speed links.

Research Area(s)
Circuits and VLSI Design
Main Field of Interest
Circuits and VLSI Design

Publications

2024

A 0.190-pJ/bit 25.2-Gb/s/wire Inverter-Based AC-Coupled Transceiver for Short-Reach Die-to-Die Interfaces in 5-nm CMOS
Yoshinori Nishi, John W. Poulton, Xi Chen, Sanquan Song, Brian Zimmer, Walker Turner, Stephen Tell, Nikola Nedovic, John Wilson, William Dally, Tom Gray
IEEE Journal of Solid-State Circuits (JSSC) (Volume: 59, Issue: 4, April 2024)

2023

A 0.190-pJ/bit 25.2-Gb/s/wire Inverter-Based AC-Coupled Transceiver for Short-Reach Die-to-Die Interfaces in 5-nm CMOS
Yoshinori Nishi, John W. Poulton, Xi Chen, Sanquan Song, Brian Zimmer, Walker Turner, Stephen Tell, Nikola Nedovic, John Wilson, William Dally, Tom Gray
2023 IEEE SYMPOSIUM ON VLSI TECHNOLOGY & CIRCUITS
A 0.297-pJ/Bit 50.4-Gb/s/Wire Inverter-Based Short-Reach Simultaneous Bi-Directional Transceiver for Die-to-Die Interface in 5-nm CMOS
Yoshinori Nishi, John W. Poulton, Walker Turner, Xi Chen, Sanquan Song, Brian Zimmer, Stephen Tell, Nikola Nedovic, John Wilson, William Dally, Tom Gray
IEEE Journal of Solid-State Circuits ( Volume: 58, Issue: 4, April 2023)

2022

A 0.297-pJ/bit 50.4-Gb/s/wire Inverter-Based Short-Reach Simultaneous Bidirectional Transceiver for Die-to-Die Interface in 5nm CMOS
Yoshinori Nishi, John W. Poulton, Xi Chen, Sanquan Song, Brian Zimmer, Walker Turner, Stephen Tell, Nikola Nedovic, John Wilson, William Dally, Tom Gray
2022 IEEE SYMPOSIUM ON VLSI TECHNOLOGY & CIRCUITS

2020

Reference-Noise Compensation Scheme for Single- Ended Package-to-Package Links
Xi Chen, Nikola Nedovic, Stephen Tell, Sudhir Kudva, Brian Zimmer, Trey Greer, John Poulton, Sanquan Song, Walker Turner, John Wilson, Tom Gray
2020 International Solid-State Circuits Conference

2019

Voltage-Follower Coupling Quadrature Oscillator with Embedded Phase-Interpolator in 16nm FinFET
Xi Chen, Sanquan Song, John Poulton, Nikola Nedovic, Brian Zimmer, Stephen Tell, Tom Gray
IEEE Custom Integrated Circuits Conference 2019
A 1.17-pJ/b, 25-Gb/s/pin Ground-Referenced Single-Ended Serial Link for Off- and On-Package Communication Using a Process- and Temperature-Adaptive Voltage Regulator
John Poulton, John Wilson, Walker Turner, Brian Zimmer, Xi Chen, Sudhir Kudva, Sanquan Song, Stephen Tell, Nikola Nedovic, Wenxu Zhao, Sunil Sudhakaran, Tom Gray, William Dally
IEEE JOURNAL OF SOLID-STATE CIRCUITS

2018

Ground-Referenced Signaling for Intra-Chip and Short-Reach Chip-to-Chip Interconnects
Walker Turner, John Poulton, John Wilson, Xi Chen, Stephen Tell, Matt Fojtik, Trey Greer, Brian Zimmer, Sanquan Song, Nikola Nedovic, Sudhir Kudva, Sunil Sudhakaran, Rizwan Bashirullah, Wenxu Zhao, William Dally, Tom Gray
Custom Integrated Circuits Conference
A 1.17pJ/b 25Gb/s/pin Ground-Referenced Single Ended Serial Link for Off- and On-Package Communication in 16nm CMOS Using a Process- and Temperature-Adaptive Voltage Regulator
John Wilson, Walker Turner, John Poulton, Brian Zimmer, Xi Chen, Sanquan Song, Stephen Tell, Nikola Nedovic, Wenxu Zhao, Sunil Sudhakaran, Tom Gray, William Dally
ISSCC

2016

A 6.5-to-23.3fJ/b/mm Balanced Charge-Recycling Bus in 16nm FinFET CMOS at 1.7-to-2.6Gb/s/wire with Clock Forwarding and Low-Crosstalk Contraflow Wiring
John Wilson, Matt Fojtik, John Poulton, Xi Chen, Stephen Tell, Trey Greer, Tom Gray, William Dally
International Solid-State Circuits Conference (ISSCC 2016)

2015

High-speed Low-power On-chip Global Signaling Design Overview
Xi Chen, John Wilson, John Poulton, Rizwan Bashirullah, Tom Gray
DesignCon

2013

A 0.54 pJ/b 20 Gb/s Ground-Referenced Single-Ended Short-Reach Serial Link in 28 nm CMOS for Advanced Packaging Applications
John Poulton, William Dally, Xi Chen, John Eyles, Trey Greer, Stephen Tell, John Wilson, Tom Gray
Journal of Solid State Circuits
A 0.54pJ/b 20Gb/s Ground-Referenced Single-Ended Short-Haul Serial Link in 28nm CMOS for Advanced Packaging Applications
John Poulton, William Dally, Xi Chen, John Eyles, Trey Greer, Stephen Tell, Tom Gray
ISSCC