Noriaki Dobashi

Title: Noriaki Dobashi: Innovator in Impedance and Analog Circuit Design

Introduction

Noriaki Dobashi is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of electrical engineering, particularly in the design of impedance adjusting circuits and fully balanced analog circuits. With a total of 2 patents, his work has garnered attention for its innovative approaches to circuit design.

Latest Patents

One of Dobashi's latest patents is an impedance adjusting circuit. This circuit is designed for setting an accurate impedance ratio and features multiple paths, each containing an impedance adjusting section. This section consists of a serially connected switch element and impedance element. The synthesized impedance of the ON resistance of the switch element and the impedance of the impedance element in each section is set to maintain a predetermined proportional relationship. This design allows for precise trimming without causing peak level variation in frequency characteristics when applied to a filter.

Another notable patent is the fully balanced analog circuit. In this design, the non-inverting input terminals of two operational amplifiers with identical characteristics are connected together. A first circuit is linked between the inverting input terminal of the first operational amplifier and a first signal input terminal, while a second circuit connects the non-inverting input terminal of the first operational amplifier to the same signal input terminal. Feedback signals are received from the output terminal of the first operational amplifier, and similar configurations are established for the second operational amplifier. This design ensures that all circuits maintain the same element schematics, enhancing the overall performance of the analog circuit.

Career Highlights

Noriaki Dobashi is currently employed at Kabushiki Kaisha Toshiba, a leading company in technology and electronics. His work at Toshiba has allowed him to further develop his innovative ideas and contribute to the advancement of electrical engineering.

Collaborations

Dobashi has collaborated with Zdzislaw Czarnul, a fellow innovator in the field. Their partnership has likely fostered the exchange of ideas and techniques, enhancing their respective contributions to technology.

Conclusion

Noriaki Dobashi's work in impedance adjusting circuits and fully balanced analog circuits showcases his innovative spirit and technical expertise. His contributions to the field continue to influence advancements in electrical engineering.