Hisashi Hirokawa

Title: The Innovative Mind of Hisashi Hirokawa

Introduction

Hisashi Hirokawa, an inventive engineer based in Tokyo, Japan, is known for his contributions to the field of electronic engineering. With a total of two patents to his name, Hirokawa has made significant advancements, particularly in the area of programmable controllers and digital output circuits.

Latest Patents

Hisashi Hirokawa's latest inventions include a programmable controller specifically designed for a digital output circuit and a printed-wiring board for industrial applications. The digital output circuit operates by utilizing an insulated power-supply circuit, which incorporates a transistor capable of turning an external power supply on or off. This action is dictated by a signal received from a light-sensitive component within the insulated circuit, triggered through the processing of a controller's signal. The circuit is adept at connecting external devices to the power supply, enhancing operational efficiency. The design further includes a unique switching unit featuring first and second mechanisms that can toggle the state of each wire between a connected and non-connected state. It cleverly integrates a logic adjusting unit that calibrates the logic output based on the type of transistor being used, allowing the circuit to operate in either a sink-current or source-current mode.

Career Highlights

Hirokawa has built his career at Mitsubishi Electric Corporation, a leader in the electrical and electronic manufacturing industry. His work there underscores a commitment to innovation and excellence, positioning him among the elite engineers contributing to the company's cutting-edge technologies.

Collaborations

During his time at Mitsubishi Electric Corporation, Hisashi Hirokawa has collaborated with notable coworkers, including Shinichi Kato and Tomoomi Nishimura. These collaborations have fostered a creative environment that fuels technological advancements and innovative solutions in their projects.

Conclusion

Hisashi Hirokawa stands out as a significant figure in the field of electrical engineering. His contributions to programmable controllers and digital output circuits have not only enhanced industrial applications but have also established him as a noteworthy innovator in his field. As technologies continue to evolve, Hirokawa's inventions will undoubtedly play a vital role in shaping the future of electronic applications.