Events

IEEE AP/CAS/ED/MTT/SSC Seminar

Title: Recent Trends and Advances in High Performance Fractional-N PLL Design and its Application for 5G Radio

Speaker: Dr. Wanghua Wu
Samsung Semiconductor Inc. USA.

Date: Friday, Sept 8th, 2023 @ 2:00-4:00PM PT

Location: Online Webinar https://ieeemeetings.webex.com/ieeemeetings/j.php?MTID=me55e717ba17f89aadaac51c74d729bae


Abstract:
This talk provides an overview of the advanced phase-locked loop (PLL) and LO generation techniques for 5G cellular applications. High performance fractional-N phase- locked loops (PLLs) are essential elements of any advanced electronic systems. In recent years, both analog and all-digital PLLs employing sampling or sub-sampling phase detector have gained popularity and demonstrated below 100-fs integrated jitter and superior figure-of-merit. The first part of this talk focuses on this PLL architecture and elaborates the advanced design techniques to achieve low jitter, low fractional spurs, fast locking, and low power operation. Both circuits design and digital calibration techniques will be presented in detail. In the second part of this talk, the low-jitter PLL together with other LO generation circuitries are demonstrated in a 28/39 GHz dual-polarized 5G mm- wave cellular chipset to support advanced features including 256-QAM and non- contiguous carrier aggregation.

Speaker biography:
Wanghua Wu received the B.Sc. degree (with honors) from Fudan University, Shanghai, China, in 2004, M.Sc. degree (cum laude) and Ph.D. degree from Delft University of Technology, The Netherlands in 2007 and 2013, respectively, all in electrical engineering. From 2013 to 2016, she was an RFIC Design Engineer in Marvell, developing high-performance frequency synthesizers for WLAN transceivers. Since 2016, she has been with Samsung Semiconductor Inc. USA. She is currently a Senior Principal Engineer and Design Manager, focusing on advanced cellular RFIC design. Her research interest is on CMOS frequency synthesis for wireless applications. She serves on the Technical Program Committee of IEEE International Solid-State Circuits Conference (ISSCC), Custom Integrated Circuits Conference (CICC), and Radio Frequency Integrated Circuits Symposium (RFIC). She serves as a Distinguished Lecturer for the IEEE Solid-State Circuits Society.