Hironobu Shiroyama

Title: Hironobu Shiroyama: Innovator in Power Circuit Technology

Introduction

Hironobu Shiroyama is a notable inventor based in Hino, Japan. He has made significant contributions to the field of electrical engineering, particularly in power circuit technology. With a total of 8 patents to his name, Shiroyama has developed innovative solutions that enhance the efficiency and functionality of power supply systems.

Latest Patents

Shiroyama's latest patents include a control circuit and a power factor correction circuit. The control circuit is designed for a rectifier circuit that includes first to fourth diodes and switches connected in parallel. This circuit rectifies an AC voltage and controls the switches based on a determination unit that identifies off-periods for the diodes. Additionally, he has developed a power supply circuit of a step-down type, which generates an output voltage at a predetermined level from an AC voltage. This circuit is notable for its design, which eliminates the need for an inductor between the rectifier circuit and the first line.

Career Highlights

Throughout his career, Hironobu Shiroyama has worked with prominent companies such as Fuji Electric Co., Ltd. and Fuji Electric Systems Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects in the electrical engineering sector.

Collaborations

Shiroyama has collaborated with several talented individuals in his field, including Masato Kashima and Mitsuru Sato. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Hironobu Shiroyama's contributions to power circuit technology exemplify his innovative spirit and dedication to advancing electrical engineering. His patents reflect a commitment to improving power supply systems, making him a significant figure in the industry.