Sumio Wada

Title: Innovations of Sumio Wada

Introduction

Sumio Wada is a notable inventor based in Koga, Japan. He has made significant contributions to the field of data storage technology, particularly in hard disk drives. With a total of 4 patents to his name, Wada's work has had a lasting impact on the industry.

Latest Patents

One of Wada's latest patents involves a read circuit that provides two different reference levels for reading data. This innovation addresses the stability of control data recorded on servo sectors compared to main data on data sectors. The patent describes a method for obtaining read pulses that accurately represent the peaks of the output waveform of a transducer. The waveform is processed through a differentiator circuit and a wave shaping circuit to produce data pulses that synchronize with the transducer's output. Additionally, a gate pulse circuit is utilized to compare the transducer output with a reference signal, ensuring precise detection of control data peaks.

Another significant patent by Wada is a shockproof data transducer position control system for rotating disks. This system enhances the reliability of hard disk data storage by incorporating an off-track detector circuit. This circuit uses servo bursts to determine if the transducer is correctly positioned on the data tracks. If the transducer strays off track, the system signals a write circuit to prevent data writing until the transducer is back in position.

Career Highlights

Wada's career is marked by his innovative contributions to Teac Corporation, where he has played a crucial role in advancing hard disk drive technology. His expertise in data storage systems has positioned him as a key figure in the industry.

Collaborations

Throughout his career, Wada has collaborated with notable colleagues such as Kazuhiko Yasuda and Akira Shinohara. Their combined efforts have led to advancements in data storage technologies.

Conclusion

Sumio Wada's contributions to the field of data storage technology are significant and impactful. His innovative patents continue to influence the design and functionality of hard disk drives.