Sadao Hosoi

Title: Sadao Hosoi: Innovator in Video Tape Technology

Introduction

Sadao Hosoi is a prominent inventor based in Atsugi, Japan. He has made significant contributions to the field of video tape technology, holding 2 patents that showcase his innovative spirit and technical expertise.

Latest Patents

One of his latest patents is a "Head tracking control system for a helical scan VTR." This invention pertains to a video tape recording and reproducing apparatus designed to reproduce video signals recorded in successive parallel tracks on a magnetic tape. The system includes first and second magnetic heads that are movable along the tracks, along with bi-morph leaves that allow for precise deflection of the heads. This technology incorporates a dithering signal to enhance tracking accuracy and corrects deviations during scanning operations. Additionally, it features an offset signal forming circuit that maintains the operation of the bi-morph leaves within their linear range, enabling increased tape reproducing speeds.

Another notable patent is the "Automatic head height control apparatus." This invention is utilized in video tape recorders that employ a rotary magnetic head secured on a deflectable device. It dynamically performs head tracking during the reproduction of previously recorded tracks, regardless of the tape transport speed. The apparatus detects the height of the magnetic head during recording and produces a feedback control signal to adjust the height, ensuring optimal performance.

Career Highlights

Sadao Hosoi is currently employed at Sony Corporation, a leading company in the electronics industry. His work has significantly impacted the development of video tape technology, enhancing the quality and efficiency of video recording and playback.

Collaborations

Throughout his career, Sadao has collaborated with notable coworkers, including Masayuki Takano and Yuichi Matsushita. Their combined efforts have contributed to advancements in video technology and innovation.

Conclusion

Sadao Hosoi's contributions to video tape technology through his patents and work at Sony Corporation highlight his role as a key innovator in the field. His inventions continue to influence the way video content is recorded and reproduced, showcasing the importance of innovation in technology.