Qingjin Du

Title: Qingjin Du: Innovator in Programmable Delay-Line Circuits

Introduction

Qingjin Du is a notable inventor based in San Diego, CA. He has made significant contributions to the field of electronics, particularly in the development of programmable delay-line circuits. His innovative work has led to the granting of a patent that showcases his expertise and creativity.

Latest Patents

Qingjin Du holds a patent for a "Programmable delay-line circuit with single delay array and real-time calibration." This invention features a programmable delay-line circuit that includes a single ring oscillator, which is continuously calibrated by a calibration logic circuit. The design incorporates a clock edge sampler that samples an input clock in response to multiple oscillator output signals from the ring oscillator, resulting in a corresponding plurality of data output signals. A clock edge voter processes these data output signals to identify the first oscillator output signal that samples an edge transition of the input clock. Based on the desired delay, a decoder selects a second oscillator output signal to produce an output clock signal.

Career Highlights

Qingjin Du is currently employed at Qualcomm Incorporated, a leading company in the telecommunications industry. His work at Qualcomm has allowed him to apply his innovative ideas in a practical setting, contributing to advancements in technology.

Collaborations

Throughout his career, Qingjin Du has collaborated with talented individuals such as Xu Zhang and Wenjing Yin. These collaborations have fostered a creative environment that encourages the exchange of ideas and innovation.

Conclusion

Qingjin Du is a distinguished inventor whose work in programmable delay-line circuits exemplifies his commitment to innovation in electronics. His contributions continue to influence the field and inspire future advancements.