Sin-Luen Cheung

Title: Sin-Luen Cheung: Innovator in Frequency-Divider Circuits and Switched Capacitor Technology

Introduction

Sin-Luen Cheung is a notable inventor based in Hong Kong, CN. He has made significant contributions to the field of electrical engineering, particularly in the development of frequency-divider circuits and switched capacitor technology. With a total of 2 patents to his name, Cheung continues to push the boundaries of innovation in his field.

Latest Patents

Cheung's latest patents include a low-voltage high-speed frequency-divider circuit. This innovative circuit generates output signals that have a frequency substantially half of the frequency of the input signal. The design comprises two D-Flip-Flop circuits, one utilizing the input signal and the other using its complement. Each D-Flip-Flop circuit consists of a pair of loading transistors, two regenerative pairs coupled with each other, and two common-gate switches.

Another significant patent is the switched-opamp technique for low-voltage switched capacitor circuits. This circuit employs two switchable operational amplifiers that operate in parallel and alternate clock phases. In a preferred embodiment, the two operational amplifiers can be implemented by a single two-stage operational amplifier with a common input stage and two switchable output pairs. This novel switched capacitor circuit can be utilized in various applications, including integrators and filter means.

Career Highlights

Sin-Luen Cheung is affiliated with The Hong Kong University of Science and Technology, where he contributes to research and development in electrical engineering. His work has garnered attention for its practical applications and innovative designs.

Collaborations

Cheung has collaborated with several esteemed colleagues, including Howard Cam Luong and Man-Chun Wong. Their combined expertise has led to advancements in their respective fields and has fostered a collaborative environment for innovation.

Conclusion

Sin-Luen Cheung stands out as a prominent inventor in the realm of electrical engineering. His contributions through innovative patents reflect his commitment to advancing technology and improving existing systems. His work continues to inspire future innovations in the field.