Company Filing History:
Years Active: 1995-2005
Title: Wayne Leung Cheung: Innovator in MR Technology
Introduction
Wayne Leung Cheung is a prominent inventor based in San Jose, CA. He has made significant contributions to the field of magneto-resistive (MR) technology, holding a total of 15 patents. His work focuses on enhancing the performance of MR sensors, which are crucial in various applications.
Latest Patents
One of Wayne's latest patents is the "CMOS low-noise MR read head pre-amplifier circuit." This innovative preamplifier system is designed for use with MR sensors. It includes an alternating current (AC) coupling module that blocks direct current (DC) voltage associated with input signals while filtering low-frequency noise. Additionally, the system features a gain stage module that utilizes cascode field effect transistors (FETs) to amplify the input signal, reduce intrinsic noise, and increase operational bandwidth. A control circuit is also integrated to provide feedback for bias regulation and disturbance rejection.
Another notable patent is the "Method and apparatus for providing matched differential MR biasing and pre-amplification." This invention offers a tightly matched and well-centered low-level MR bias voltage directly to the sensing element. It enables controlled input-impedance differential pre-amplification without the need for common-mode voltage level control loops.
Career Highlights
Wayne Leung Cheung is currently employed at International Business Machines Corporation (IBM), where he continues to innovate in the field of MR technology. His work has significantly advanced the capabilities of MR sensors, making them more efficient and reliable.
Collaborations
Wayne has collaborated with notable colleagues, including Ju-Hi John Hong and Kok-Kia Chew. Their combined expertise has contributed to the development of cutting-edge technologies in the MR field.
Conclusion
Wayne Leung Cheung is a distinguished inventor whose work in MR technology has led to numerous patents and advancements in the industry. His contributions continue to shape the future of sensor technology, making a lasting impact on various applications.
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