Makoto Ishimaru

Title: Makoto Ishimaru: Innovator in DC-DC Converter Technology

Introduction

Makoto Ishimaru is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of DC-DC converters. With a total of 7 patents to his name, Ishimaru's work has had a lasting impact on power conversion technology.

Latest Patents

One of Ishimaru's latest inventions is a step-up converter. This current-mode control step-up converter is designed to reduce the minimum duty ratio to a sufficiently small value, facilitating the setting of the maximum duty ratio. The converter includes a current detector that generates a current detection signal corresponding to the current of a rectifier, an error amplifier that produces an error signal related to the output DC voltage, and a control circuit that manages the ON/OFF state of the main switch based on these signals. This innovative design allows for precise control of the inductor current, stabilizing the output effectively.

Another notable patent is his work on a DC-DC converter and its control circuit. This invention features a nonlinear relationship between the duty ratio of a drive signal and the output DC voltage, while maintaining a linear relationship between the error signal and the output voltage. The design simplifies the stabilization of the feedback system, enhancing the overall performance of the converter.

Career Highlights

Throughout his career, Ishimaru has worked with leading companies in the electronics industry, including Panasonic Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in power electronics and innovation.

Collaborations

Ishimaru has collaborated with notable colleagues such as Takuya Ishii and Hiroki Akashi. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the field.

Conclusion

Makoto Ishimaru's contributions to the field of electrical engineering, particularly in DC-DC converter technology, highlight his innovative spirit and dedication to advancing power conversion solutions. His patents reflect a deep understanding of electrical systems and a commitment to improving efficiency in power management.