Lizhong Sun

Title: The Innovations of Lizhong Sun

Introduction

Lizhong Sun is a notable inventor based in Budd Lake, NJ (US). He has made significant contributions to the field of technology, particularly in the area of frequency synthesizers. With a total of 6 patents to his name, Sun has demonstrated a commitment to innovation and advancement in his field.

Latest Patents

One of his latest patents is a fractional-N baseband frequency synthesizer designed for Bluetooth applications. This baseband clock synthesizer is particularly useful in Bluetooth piconet devices. It has the capability of generating either 12 MHz or 13 MHz clock signals from various reference clock signals, such as 12.00, 12.80, 13.00, 15.36, 16.80, 19.20, 19.44, 19.68, 19.80, and 26.00 MHz. The invention includes a fractional-N frequency divider implemented with a phase-locked loop (PLL) that features a variable divider. This allows the use of virtually any reference frequency input to generate a locked 156 MHz clock signal, which serves as the basis for the 12 MHz or 13 MHz baseband clock signal. Additionally, a residue feedback sigma-delta modulator provides a varying integer sequence to an integer divider in the feedback path of the PLL. This effectively allows division by non-integer numbers in the PLL, enabling it to be referenced to virtually any clock while still providing a fixed output clock signal.

Career Highlights

Throughout his career, Lizhong Sun has worked with prominent companies such as Agere Systems Inc. and Agere Systems Guardian Corporation. His experience in these organizations has contributed to his expertise and innovative capabilities in the field of technology.

Collaborations

Some of his notable coworkers include Dale Harvey Nelson and William Eric Holland. Their collaborations have likely played a role in the development of his innovative ideas and patents.

Conclusion

Lizhong Sun's contributions to technology, particularly in frequency synthesizers, highlight his role as a significant inventor. His patents reflect a deep understanding of complex systems and a commitment to advancing technology.