Company Filing History:
Years Active: 2009-2020
Title: The Innovations of WenJun Cao
Introduction
WenJun Cao is a prominent inventor based in Singapore, known for his contributions to data storage technology. With a total of 4 patents to his name, he has made significant advancements in the field, particularly in vibration compensation and servo control systems.
Latest Patents
One of his latest patents focuses on the attenuation of vibration-induced disturbances in a data storage device. This invention involves a data storage drive that includes a servo loop for positioning a head over a disc. The servo loop features a sensor located in the head that senses servo information on the disc and produces a servo signal. This signal is combined with a reference signal to create a raw position error signal (PES). The system also incorporates at least one phase-matching disturbance attenuation (PMDA) filter, which processes the raw PES to output a vibration-cancellation signal. This signal, when combined with the raw PES, effectively cancels out vibration-induced disturbances, resulting in a refined PES. A servo controller then uses this refined PES to generate a servo control signal, which directs an actuator to move the head accordingly.
Another notable patent by WenJun Cao involves vibration compensation using a disk locked clock error. This apparatus includes a disk locked clock system designed to estimate timing errors and generate corresponding timing error signals. The system also features a feedforward microactuator compensator that produces a microactuator compensation signal based on the timing error signal, without relying on a vibration sensor signal.
Career Highlights
WenJun Cao is currently employed at Seagate Technology Incorporated, a leading company in data storage solutions. His work has significantly impacted the efficiency and reliability of data storage devices.
Collaborations
Throughout his career, WenJun has collaborated with notable colleagues, including MingZhong Ding and Qiang Bi. Their combined expertise has contributed to the advancement of innovative technologies in the field.
Conclusion
WenJun Cao's contributions to data storage technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the development of more efficient and reliable data storage solutions.