James J Zhao

Title: **James J Zhao: Innovator in DSL Technology**

Introduction

James J Zhao, an accomplished inventor based in Tustin, California, has made significant contributions to the field of telecommunications. With a total of two patents to his name, Zhao is recognized for his innovative work in developing advanced circuits and systems designed to enhance digital subscriber line (DSL) technology.

Latest Patents

Zhao's extensive expertise is reflected in his latest patents. The first patent, titled "Wide-band analog front-end for DSL applications," describes an analog front-end circuit and method capable of supporting multiple DSL standards, including Asymmetric Digital Subscriber Line (ADSL) and Very High-Speed Digital Subscriber Line (VDSL). This invention incorporates several circuit blocks that can be selectively utilized within the transmit and receive paths of DSL signals. It also features adjustable gain settings for amplifiers and customizable frequency bandwidth for signal filters. Notably, the receive path includes an analog-to-digital converter (ADC) that operates at or above the Nyquist sampling rate, ensuring high fidelity in signal processing.

The second patent, "Filter tuner system and method," presents a method for a sophisticated filter tuner system. This system comprises sequential logic, a register, a comparator, and various oscillators. The method involves executing a calibration cycle, followed by a measurement cycle, to accurately tune a filter based on determined variations in cutoff frequency.

Career Highlights

Throughout his career, James J Zhao has been associated with leading companies in the telecommunications industry. He has held significant roles at two notable organizations: Conexant, Inc., where he contributed to advancements in semiconductor solutions, and Globespan Virata Corporation, a company recognized for its DSL technology innovations.

Collaborations

In his professional journey, Zhao has collaborated with esteemed colleagues such as Brian Horng and Nianxiong Tan. These partnerships have played a vital role in driving forward his innovative projects and contributing to the development of cutting-edge telecommunications solutions.

Conclusion

James J Zhao is a notable inventor whose contributions to DSL technology have significantly impacted the telecommunications landscape. With his latest patents showcasing his expertise in analog front-end circuits and filter tuning systems, Zhao continues to be a key figure driving innovation in this ever-evolving field. His collaborations and career achievements reflect a deep commitment to enhancing technological capabilities in telecommunications.