Tadahiro Yamaguchi

Title: The Innovations of Tadahiro Yamaguchi

Introduction

Tadahiro Yamaguchi is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of technology, particularly in optical disc technology and phase-locked loop circuits. With a total of 4 patents to his name, Yamaguchi continues to influence the industry through his innovative designs.

Latest Patents

One of Yamaguchi's latest patents involves an optical disc design. This optical disc features a pair of circular disc substrates arranged in confronted relation, with their signal recording layers directed inwardly. The substrates are bonded together through spacers at both the inner and outer peripheral portions. A vent hole is strategically formed in the main surface of one of the disc substrates, and a disc label is bonded to cover this vent hole.

Another significant patent is for a phase-locked loop detecting circuit. This circuit is designed to detect a proper locked state between the output of a phase-locked loop clock generating circuit and the timing component of a received composite signal. The circuit produces an internal synchronization pulse signal in response to the output of the phase-locked loop. Additionally, it generates a frame synchronization sequence detection pulse signal by detecting frame synchronization sequences in the composite signal. The internal synchronization pulse signal and the frame synchronization sequence detection pulse signal are compared to ensure they are in time coincidence. If they are not, a synchronization hunting controller adjusts the phase of the internal synchronization pulse signal until they align.

Career Highlights

Yamaguchi has built a successful career at Pioneer Electronic Corporation, where he has been able to apply his innovative ideas and technical expertise. His work has not only advanced the company's product offerings but has also contributed to the broader field of electronics.

Collaborations

Throughout his career, Yamaguchi has collaborated with several talented individuals, including Toshikazu Yoshino and Ryuichi Naito. These collaborations have fostered an environment of creativity and innovation, leading to the development of groundbreaking technologies.

Conclusion

Tadahiro Yamaguchi is a distinguished inventor whose work in optical disc technology and phase-locked loop circuits has made a lasting impact on the industry. His innovative spirit and dedication to advancing technology continue to inspire future generations of inventors.