Yu-Chi Cheng

Title: Innovations of Yu-Chi Cheng

Introduction

Yu-Chi Cheng is a notable inventor based in Fremont, California. He has made significant contributions to the field of high-speed data recovery and phase interpolation circuits. With a total of four patents to his name, Cheng's work has had a considerable impact on the technology industry.

Latest Patents

One of his latest patents is titled "Method and apparatus for high-speed clock data recovery using low-speed circuits." This invention describes a clock data recovery (CDR) circuit that effectively recovers data from high-speed serial transmissions using components that operate at a fraction of the data speed. The CDR consists of a phase detector, an averaging circuit, and a phase interpolator. The phase detector samples each data bit at its midpoint and transitional region, comparing the two samples to determine the timing of the sampling clock. The averaging circuit filters out high-frequency jitters in the phase detector output, passing the filtered signals to the phase interpolator for optimal phase selection.

Another significant patent is the "Divide-by-N differential phase interpolator." This phase interpolator circuit produces two phase resolution elements using a control signal with fewer bits. It combines the functions of a divide-by-N circuit with a phase interpolation circuit, utilizing a higher-speed clock as input. By performing phase interpolation at high speed and subsequently slowing down for later circuits, the phase resolution increases while requiring fewer control bits.

Career Highlights

Cheng has worked with several companies throughout his career, including Neomagic Corporation and Neoaxiom Corporation. His experience in these organizations has contributed to his expertise in developing innovative technologies.

Collaborations

Some of his notable coworkers include David Y Wang and Jyn-Bang Shyu. Their collaboration has likely fostered an environment of innovation and creativity in their respective projects.

Conclusion

Yu-Chi Cheng's contributions to the field of high-speed data recovery and phase interpolation circuits demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology and improving data transmission methods.