Fei Yao

Title: Fei Yao and Long-Range Ethernet Signaling

Introduction

Fei Yao is an inventor based in San Jose, California, and is associated with Analogix Semiconductor, Inc. His patent work addresses signaling and coding methods for extending the reach of Ethernet transmission.

Latest Patents

Yao is credited with 1 patent: “Signaling and Coding Methods and Apparatus for Long-Range 10 and 100 Mbps Ethernet Transmission.” The invention describes a physical-layer (PHY) device that measures its distance from a companion PHY. When the distance is within specification limits, the devices communicate normally. When it exceeds those limits, the device checks whether its companion supports long-range operation and, if so, switches to a long-range signaling method.

In a preferred embodiment, the system uses NRZ coding with pre-emphasis on the first bit in a sequence of two or more identical bits for one extended range. For a still greater range, it uses PAM4 coding. The patent describes multiple embodiments of these methods.

Career Highlights

Yao’s listed patent highlights work on Ethernet physical-layer signaling and coding, with a focus on maintaining communication over distances beyond standard specification limits. He is associated with Analogix Semiconductor, Inc.

Collaborations

The provided information lists Jianbin Hao and Kewei Yang as Yao’s coworkers. The patent description concerns coordination between PHY devices, including checking whether a companion device supports long-range signaling.

Conclusion

Fei Yao’s patent describes techniques for extending 10 and 100 Mbps Ethernet transmission through distance-aware PHY operation and alternative coding methods.