Location History:
- Hyogo-ken, JP (2006)
- Mita, JP (2009)
- Hyogo, JP (2001 - 2013)
Company Filing History:
Years Active: 2001-2013
Title: **Kohji Yoshii: A Pioneer in Constant Voltage Circuit Innovations**
Introduction
Kohji Yoshii, an accomplished inventor based in Hyogo, Japan, has made significant contributions to the field of electrical engineering. With a remarkable portfolio that includes 15 patents, Yoshii's work focuses primarily on constant voltage circuits, showcasing his innovative spirit and technical expertise.
Latest Patents
Yoshii's latest patents highlight his dedication to enhancing electrical circuit designs. One of his notable inventions is a **constant voltage circuit** that features an output control transistor and an overcurrent protection circuit. This sophisticated system includes a proportional current generation circuit part, a current division circuit part, a division ratio control circuit part, a current-voltage conversion circuit part, and an output current control circuit part. These components work synergistically to ensure that when the output voltage from the current-voltage conversion circuit reaches a specified threshold, the output current control circuit effectively prevents further current increases, thereby regulating the voltage output.
Another significant patent by Yoshii is a **disclosed constant voltage circuit** designed to efficiently convert an input voltage into a predetermined constant voltage. This advanced circuit is built with an output transistor, which channels output current from the input to the output terminal. It also incorporates an error amplifier circuit unit to maintain the output at a predetermined reference voltage by controlling the output transistor's operations. Additionally, it features a ramp voltage generating circuit unit that creates a ramp voltage with a controlled increase rate and an amplifier circuit that amplifies the voltage difference, ensuring precise control of the output transistor.
Career Highlights
Yoshii's career is marked by his influential role at Ricoh Company, Ltd., where he has played a vital part in developing cutting-edge electronic solutions. His inventions have not only advanced technological capabilities but also contributed to the efficiency and reliability of power supply systems.
Collaborations
Throughout his innovative journey, Kohji Yoshii has collaborated with notable engineers such as Hideki Agari and Toshihisa Nagata. Their combined expertise has enabled the successful development and realization of complex circuit designs, further enhancing the impact of their collective work in the electronics industry.
Conclusion
Kohji Yoshii stands out as a leading inventor whose contributions to constant voltage circuits have paved the way for advancements in electrical engineering. With a strong portfolio of patents and impactful collaborations, Yoshii continues to influence the field, making strides in innovation that benefit both industry and society alike.