Qun Gu

Title: Qun Gu: Innovator in Signal Processing Technologies

Introduction

Qun Gu is a prominent inventor based in Davis, CA, known for his contributions to signal processing technologies. With a total of 9 patents, he has made significant advancements in the field, particularly in the design of systems that enhance the performance of up-conversion mixers and differential signal processing.

Latest Patents

One of his latest patents is titled "Harmonic-based nonlinearity factorization scheme to facilitate up-conversion mixer linearity." This invention focuses on a system that implements an up-conversion mixer, featuring a regulator-based linearized transconductance stage. This stage converts a differential intermediate frequency voltage signal into a corresponding pair of intermediate frequency currents. The system also includes current mirrors that duplicate these currents into sources for a set of switching transistors. These transistors utilize a differential local oscillator signal to gate the duplicated currents, producing a differential radio frequency output signal. Additionally, a combination of capacitors and/or inductors is coupled to the common source nodes of the switching transistors to suppress higher-order harmonics.

Another notable patent is "Systematic coupling balance scheme to enhance amplitude and phase matching for long-traveling multi-phase signals." This invention describes a system that implements a coupling balance scheme for differential signals. It consists of a set of 2N signal lines carrying N differential signal pairs, organized into consecutive sequences. Each sequence includes a pattern of twists that switch signal positions for each differential pair, effectively canceling coupling effects with respect to other signal lines.

Career Highlights

Qun Gu has worked at prestigious institutions, including the University of California and the California Institute of Technology. His work at these institutions has allowed him to develop innovative technologies that have practical applications in various fields.

Collaborations

Throughout his career, Qun Gu has collaborated with notable colleagues, including Jinbo Li and Adrian J. Tang. These collaborations have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

Qun Gu's innovative work in signal processing and his impressive portfolio of patents highlight his significant contributions to the field. His inventions continue to influence the development of advanced technologies in various applications.