Location History:
- Nagano, JP (2011)
- Matsumoto, JP (2010 - 2022)
Company Filing History:
11 out of 4,811 
3 out of 116 
1 out of 5 Years Active: 2010-2022
Title: Innovations by Koji Sonobe: A Pioneer in Power Supply Technology
Introduction
Koji Sonobe, an accomplished inventor based in Matsumoto, Japan, has made significant strides in the field of power supply technology. With a remarkable portfolio of 14 patents, his work focuses primarily on enhancing the efficiency and functionality of switching power supply systems.
Latest Patents
Among Koji Sonobe's latest innovations are two notable patents:
1. **Controller of Switching Power Supply Apparatus** - This invention features a controller designed for a current resonance switching power supply apparatus, aimed at providing a constant output voltage to a load. The apparatus includes a resonance circuit that generates a feedback signal to indicate the error level between the output voltage and the target voltage. This design incorporates a load current detection circuit to enhance performance and efficiency.
2. **Switching Power Supply Control Circuit with Bottom Point Detection** - This patent revolves around a switching power supply apparatus featuring a control circuit that converts AC source voltage into DC voltage. It utilizes a comparison circuit that generates an output signal based on specific voltage levels during the off-state of the switching device. Through careful design, this circuit ensures the switching device operates smoothly without any bottom skip upon detection of the drain voltage bottom point.
Career Highlights
Koji Sonobe's professional journey includes pivotal roles in esteemed companies, such as Fuji Electric Co., Ltd. and Fuji Electric Systems Co. Ltd. His work has significantly contributed to advancements in power supply systems, making him a notable figure in the industry.
Collaborations
Throughout his career, Koji has collaborated with talented individuals, including Jian Chen and Masaru Saito. These collaborations have further enriched his inventive framework and resulted in impactful technological advancements.
Conclusion
Koji Sonobe's innovations highlight his profound expertise in power supply technology. His contributions not only reflect his inventive spirit but also pave the way for future advancements in the field. As a leading inventor, he continues to inspire others with his remarkable achievements and commitment to excellence in engineering.