Wonho Lee

Title: Wonho Lee and High-Speed Signal Conversion

Introduction

Wonho Lee is an inventor associated with San Jose, California. His patent describes a high-speed circuit that converts a single-ended electrical signal into complementary differential outputs, with automatic control to reduce timing skew between the two signal paths.

Latest Patents

Lee is associated with 1 patent: “High-speed single-ended-to-differential converter with skew control.” The invention concerns an electrical integrated circuit co-packaged with a photonic integrated circuit in a system-in-package architecture. A reverse-biased photodiode provides the single-ended input, which the circuit converts into differential outputs.

The design uses adjustable skew correctors in both output branches. A skew-detection circuit asynchronously samples the outputs with a non-synchronized clock, while a delay detector estimates the difference between branch delays from accumulated sampling errors and clock cycles. This enables automatic skew correction without clock recovery or synchronization.

The approach is intended to preserve timing integrity and reduce bit-error rates while benefiting from differential signaling’s signal-to-noise ratio and common-mode noise rejection. It is designed to accommodate variable data rates, including high-speed links such as 56-Gb/s PAM4, and to simplify integration with downstream current-mode logic stages.

Career Highlights

The available information identifies Lee’s work through this patent and lists Sicily Merger Sub II, Inc. as his company affiliation. The patent focuses on signal conversion and timing correction for high-speed electronic and photonic systems.

Collaborations

Parmanand Mishra and Han Hao are listed as Lee’s coworkers. The provided information does not specify their roles in the patent or the nature of their collaboration.

Conclusion

Wonho Lee’s patent presents an approach to converting photodiode signals into differential outputs while automatically correcting skew, supporting reliable high-speed links and integrated electronic-photonic systems.