Location History:
- Fujisawashi, JP (1983)
- Fujisawa, JP (1983 - 1986)
Company Filing History:
Years Active: 1983-1986
Title: Shigeru Todokoro: Innovator in Wave-Shaping Circuits and Optical-Disc Technology
Introduction
Shigeru Todokoro is a notable inventor based in Fujisawa, Japan. He has made significant contributions to the fields of wave-shaping circuits and optical-disc technology. With a total of 5 patents to his name, Todokoro's work has had a lasting impact on the industry.
Latest Patents
One of his latest patents is a wave-shaping circuit. This circuit comprises a comparator that compares the level of a signal reproduced from a magnetic tape, where PCM signals are recorded, with a reference signal. It also includes a D flip-flop circuit that holds the output signal from the comparator for a prescribed period. When the reproduced signal exceeds the original reference signal level, the reference signal is adjusted accordingly. This innovation helps prevent strains that occur during high-density recording from being reproduced.
Another significant patent is the tracking servo system for an optical-disc information reproducing apparatus. This system features a light source that generates a light beam to scan a target track on an optical disc. The information is stored as a series of pits arranged in the form of the track. The system includes four photodetectors arranged in pairs to convert the image of the pit into electric signals. A circuit compares the phases of these signals to produce a tracking error signal, which guides a motor and lens to accurately scan the target track.
Career Highlights
Shigeru Todokoro is currently employed at Tokyo Shibaura Denki Kabushiki Kaisha, a company known for its advancements in electrical and electronic engineering. His work has been instrumental in developing technologies that enhance data storage and retrieval processes.
Collaborations
Throughout his career, Todokoro has collaborated with notable colleagues, including Tadashi Kojima and Hideki Sakano. These partnerships have fostered innovation and contributed to the success of various projects.
Conclusion
Shigeru Todokoro's contributions to wave-shaping circuits and optical-disc technology highlight his role as a leading inventor in his field. His patents reflect a commitment to advancing technology and improving data handling methods.