Haruo Watanabe

Title: Haruo Watanabe: Innovator in Switching Power Supply Technology

Introduction

Haruo Watanabe is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of switching power supply technologies. With a total of 4 patents to his name, Watanabe's work has had a lasting impact on the industry.

Latest Patents

Watanabe's latest patents include innovative designs for switching power supplies. One of his patents describes a switching power supply that incorporates a voltage detector at the output of a power supply circuit. This detector is connected to the negative input of an error amplifier, which amplifies the error between the detected voltage and a reference voltage. The output of the amplifier is then connected to the negative inputs of two comparators through split resistors. This configuration ensures the stability of the switching power supply without compromising the frequency band of the amplified error signal, resulting in stable output ripple characteristics.

Another patent details a switching power supply that utilizes first and second switching elements that are alternately activated. This design allows an alternating current to flow through a primary winding of a transformer, inducing voltages across the secondary windings. The synchronous rectifying transistors are activated by these induced voltages, minimizing losses caused by internal parasitic diodes. This innovative approach enhances the efficiency of the power supply.

Career Highlights

Throughout his career, Haruo Watanabe has worked with prominent companies in the electrical manufacturing sector. He has been associated with Shindengen Electric Manufacturing Company Limited and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in power supply technologies.

Collaborations

Watanabe has collaborated with notable colleagues in his field, including Yoshinori Kobayashi and Yutaka Sekine. These collaborations have further enriched his work and innovations in switching power supply technology.

Conclusion

Haruo Watanabe's contributions to the field of electrical engineering, particularly in switching power supply technology, have established him as a significant inventor. His innovative patents and collaborations reflect his dedication to advancing technology in this area.