This inventor holds 4 USPTO granted patents and 6 published patent applications. Top assignee: Rohm Co., Ltd.. Active years: 2021-2025.
Company Filing History:
Years Active: 2021-2025
Title: Satoshi Maejima: Innovator in Power Factor Improvement Circuits
Introduction
Satoshi Maejima is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of power factor improvement circuits. With a total of four patents to his name, Maejima's work is recognized for its innovative approach to enhancing circuit efficiency.
Latest Patents
One of Maejima's latest patents focuses on a control circuit for a power factor improvement circuit and a semiconductor integrated circuit device. This invention provides a power factor improvement circuit that incorporates a DC/DC converter along with an arithmetic circuit. The circuit receives a first voltage with a full-wave rectified waveform at its input voltage detection terminal. It generates a second voltage by amplifying the error between a first detection voltage and a reference voltage based on the output voltage of the DC/DC converter. Furthermore, a third voltage is produced by multiplying the first voltage by the second voltage. The arithmetic circuit then adds an offset voltage to the third voltage to create a fourth voltage. A comparator is utilized to compare a second detection voltage with the fourth voltage, while a drive circuit manages the on/off operation of the switching transistor according to the comparator's output. When the second detection voltage exceeds the fourth voltage, the switching transistor is turned off, enhancing the circuit's efficiency.
Career Highlights
Satoshi Maejima is currently employed at Rohm Co., Ltd., a leading company in the semiconductor industry. His work at Rohm has allowed him to focus on innovative solutions that improve power efficiency in electronic devices. His contributions have been instrumental in advancing the company's technological capabilities.
Collaborations
Throughout his career, Maejima has collaborated with notable colleagues, including Takumi Fujimaki and Junichi Hagino. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies.
Conclusion
Satoshi Maejima's work in power factor improvement circuits exemplifies the impact of innovation in electrical engineering. His patents reflect a commitment to enhancing circuit efficiency and advancing technology in the semiconductor industry.