Tatsuya Negishi

Title: Tatsuya Negishi: Innovator in Magnetic Disc Storage Technology

Introduction

Tatsuya Negishi is a notable inventor based in Fujioka, Japan. He has made significant contributions to the field of magnetic disc storage technology, holding 2 patents that showcase his innovative approach to improving data storage systems.

Latest Patents

Negishi's latest patents focus on advancements in magnetic disc storage apparatus. The first patent introduces a technique for controlling the drive of a voice coil motor. This technique prioritizes the effective reduction of heat generation and electromagnetic interference (EMI) noise, which are known to induce read/write errors. It also enhances the positioning control of the magnetic head during tracking operations and improves high-speed access by shortening the seek operation period. The apparatus features a mode that drives the coil of the voice coil motor with linear control from both terminals, as well as a mode that employs pulse width control for one terminal during seek operations.

The second patent describes a magnetic disc storage apparatus that includes a magnetic head for reading information from a storage track on a spinning magnetic storage disc. It utilizes a voice coil motor to move the magnetic head and a magnetic head drive system that executes position control by monitoring the state of the magnetic head. This system incorporates multi-mode driving means, allowing for both linear and pulse drive modes. The invention effectively reduces heating and EMI, enabling high accuracy in position control and high-speed access.

Career Highlights

Throughout his career, Tatsuya Negishi has worked with prominent companies such as Hitachi, Ltd. and Hitachi ULSI Systems Co., Ltd. His experience in these organizations has contributed to his expertise in magnetic storage technologies.

Collaborations

Negishi has collaborated with notable colleagues, including Yasuhiko Kokami and Kenji Nishimura. Their combined efforts have further advanced the field of magnetic disc storage.

Conclusion

Tatsuya Negishi's innovative work in magnetic disc storage technology has led to significant advancements in the industry. His patents reflect a deep understanding of the challenges in data storage and provide effective solutions to enhance performance.