2026-11-13
4:00 PM - 5:30 PM
LSS317
Event Details
- Time：16:00-17:30,13rd Novempber(Friday),2026
- Venue: XJTLU North Campus, Life and Science Building-LSS317, 111 Ren'ai Road, Dushu Lake Higher Education Town, SIP, Suzhou, Jiangsu, China
- Language: Chinese(IFlytek translation provided)
- Host：XJTLU ASRC
Agenda
15:40-16:00 Sign in
16:00-16:05 Welcome Speech
16:05-16:35 Keynote：Progress in Gallium nitride RF Semiconductor Technology Speaker：Dr. Yi Pei
16:35-17:05 Keynote：Design of dB-Linear Variable Gain Amplifiers: A Key Building Block for Optical Communication Receivers — Progress and Outlook Speaker：Dr. Zhenghao Lu
17:05-17:30 Communication and Discussion
Invited speaker
Yi Pei Doctor
Doctor Yi Pei is Technical Vice President of Dynax Semiconductor, Suzhou. He earned his B.S. degree from Peking University and Ph.D. from the University of California, Santa Barbara. He is honored as a National Leading Talent in Science and Technology Innovation under the National Major Talent Program, and has received the Jiangsu May Fourth Youth Medal, the Second Prize of Science and Technology Progress from the China Institute of Electronics, and the Second Prize of Engineering Technology from the Ministry of Education. He serves as a member of the Technical Expert Committee of the National Innovation Center for Third-Generation Semiconductor Technology, a member of the Components Committee of the China Power Supply Society, and Chair of the SEMI China GaN Working Group. Additionally, he is appointed as an Industry Professor of Jiangsu Province (at Soochow University) and an External Graduate Supervisor at Peking University, University of Science and Technology of China, and Xi’an Jiaotong-Liverpool University. He has published over 120 papers and filed more than 150 patents.
Zhenghao Lu Doctor
Doctor Zhenghao Lu received his B.S. degree in Microelectronics from Fudan University in 2001 and his Ph.D. degree in RF IC Design from Nanyang Technological University, Singapore, in 2008. He has conducted relevant R&D work in several design companies and participated in numerous analog and RF IC development projects.
He is currently with the School of Electronic and Information Engineering, Soochow University. His main research interests include sensor interface ICs and systems, ultra-low-power analog ICs, etc. He has presided over and participated in many national, provincial and municipal research projects, published dozens of papers on IC design, and obtained a number of authorized invention patents.
Abstract
Progress in Gallium nitride RF Semiconductor Technology
Speaker: Dr. Yi Pei
With the advancement of mobile communications, the vision for future 6G networks is to achieve an integrated "air-space-ground-sea" architecture. Gallium nitride (GaN) RF chips offer distinct advantages in terms of transmit power, efficiency, bandwidth, operating temperature, and radiation resistance, enabling significant reductions in device size and improvements in energy efficiency. This talk will introduce cutting-edge advances in GaN RF electronics, covering perspectives from materials, fabrication, device design, modeling, and applications. The company Dynax Semiconductor has independently developed a complete technological system for GaN RF chips. Low-voltage GaN technology has taken the lead in achieving system-level validation of GaN RF chips in mobile terminals. High-voltage GaN technology has reached a world-leading power density of 59.8 W/mm at 10 GHz. Breakthroughs have also been made in high-frequency applications, extending into the millimeter-wave and terahertz (THz)bands. Chip architectures are further evolving toward multi-functional integration and chiplet-based designs.
Design of dB-Linear Variable Gain Amplifiers: A Key Building Block for Optical Communication Receivers — Progress and Outlook
Speaker: Dr. Zhenghao Lu
Automatic Gain Control (AGC) is a critical building block in optical communication receiver circuits. Its core circuit is the Variable Gain Amplifier (VGA). A key characteristic of the VGA used in the AGC loop is its dB-linear gain tuning capability: in other words, the gain of the VGA varies exponentially with a linearly changing control voltage. A dB-linear VGA can deliver a wider gain tuning range, help maintain consistent loop transient response and settling time, guarantee AGC stability under different input signal levels, and maximize the loop bandwidth. This talk will overview the recent advances in dB-linear Variable Gain Amplifiers (VGAs), summarize three fundamental approaches to realizing dB-linear gain control, and present typical circuit architectures. In addition, the talk will also discuss performance metrics including tuning range and gain error. Finally, this lecture will compare and summarize various dB-linear VGA implementations and outline prospects for their future development.
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