Yoshitsugu Hirose

Title: The Innovations of Yoshitsugu Hirose

Introduction

Yoshitsugu Hirose is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 9 patents. His work focuses on enhancing the performance and reliability of electronic devices.

Latest Patents

One of his latest inventions is a reference voltage generator. This device includes a depletion NMOS transistor of a first conductivity type that allows a constant current to flow. An enhancement NMOS transistor, also of the first conductivity type, is diode-connected to the depletion NMOS transistor to generate a reference voltage. A resistor surrounds the periphery of both transistors, and a diode is connected in series to a constant current source. This configuration provides a voltage that controls the current flowing through the resistor when the environmental temperature is lower than a preset temperature. The reference voltage generator is designed to operate effectively under specific temperature conditions, ensuring that the voltage consumed in the resistor remains approximately constant.

Another notable patent is for a semiconductor device that boasts high electrostatic discharge (ESD) tolerance. This device features a plurality of source wirings formed of metal films that connect multiple sources to a ground voltage wiring. Similarly, drain wirings connect drains to an input voltage wiring, while gate wirings connect gates to the ground voltage wiring. Additionally, a back gate wiring is formed of a metal film to connect a back gate to the ground voltage wiring, ensuring enhanced performance and reliability.

Career Highlights

Yoshitsugu Hirose has worked with several notable companies throughout his career, including Seiko Instruments Inc. and Sii Semiconductor Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in semiconductor technology.

Collaborations

He has collaborated with talented individuals in the field, including Jun Osanai and Masayuki Hashitani. These partnerships have contributed to the advancement of his inventions and the overall progress in semiconductor technology.

Conclusion

Yoshitsugu Hirose's contributions to the field of semiconductor technology are significant and impactful. His innovative patents and collaborations highlight his dedication to advancing electronic device performance and reliability.