Location History:
- Yokohamashi, JP (1985)
- Yokohama, JP (1986)
Company Filing History:
Years Active: 1985-1986
Title: Tomohide Soejima: Innovator in FET Oscillator Technology
Introduction
Tomohide Soejima is a prominent inventor based in Yokohamashi, Japan. He has made significant contributions to the field of electronics, particularly in the development of field-effect transistor (FET) oscillators. With a total of 2 patents to his name, Soejima's work has garnered attention for its innovative approach and practical applications.
Latest Patents
One of Soejima's latest patents involves a FET oscillator that exhibits negative resistance due to high impedance. This design features a bias circuit connected to the drain of a field-effect transistor, while a source circuit, which includes a transmission line and a self-bias circuit, is connected to the source of the transistor. The configuration allows the source to be substantially open-circuited at the oscillation frequency, enabling the field-effect transistor to operate as a two-terminal element that exhibits negative resistance. A resonant circuit is also connected to the gate of the transistor, which contributes to the stability of the oscillation frequency. This innovative oscillator requires only a single bias circuit for the drain, eliminating the need for a bias circuit for the gate.
Career Highlights
Tomohide Soejima is currently employed at Tokyo Shibaura Denki Kabushiki Kaisha, a company known for its advancements in electrical engineering and technology. His work at this organization has allowed him to further develop his ideas and contribute to the field of electronics.
Collaborations
Soejima has collaborated with notable colleagues, including Hideki Torizuka and Shigekazu Hori. These partnerships have facilitated the exchange of ideas and have played a crucial role in the advancement of their collective research.
Conclusion
Tomohide Soejima's contributions to the field of FET oscillators demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to advancing electronic technology, and his work continues to influence the industry.