Introduction: Masanori Ishii, a prominent inventor based in Kawagoe, Japan, has made significant contributions to the field of power supply technologies. With a portfolio of five patents, Ishii continues to push the boundaries of innovation, particularly in the design and efficiency of electronic circuits.

Latest Patents: Among Ishii's latest inventions are two groundbreaking patents: the **Synchronous Rectifying Circuit** and the **AC-DC Converter**. The synchronous rectifying circuit eliminates the need for a diode element in parallel with a rectifying transistor, leading to highly efficient and stable operation for switching power supplies. The innovative design detects the "on" drive signal of a switching transistor and employs a flip-flop circuit to control the rectifying transistor, enhancing efficiency and stability even with indefinite operation delay times.

In the AC-DC converter patent, Ishii addresses a common issue where light load voltages tend to rise excessively. By integrating a pulse width modulation (PWM) circuit, a frequency divider, and a peak value detector, the converter broadens its application range of AC input voltages while maintaining regulated output during varying load conditions.

Career Highlights: Masanori Ishii works at Toko, Inc., a company known for its specialization in electronic components. His inventive work not only contributes to the efficiency of power supplies but also establishes new standards within the industry. Ishii's commitment to precision in circuit design reflects his deep understanding of electronic engineering principles.

Collaborations: Throughout his career, Ishii has collaborated with notable colleagues such as Koji Arakawa and Hiroichi Ishikawa. Together, they have explored various advancements in electronics, further enriching the field with innovative solutions and technologies.

Conclusion: As an inventor, Masanori Ishii exemplifies the spirit of innovation in the realm of electronics. His latest patents not only demonstrate his technical prowess but also pave the way for more efficient and effective power supply systems. With continued collaboration and exploration, Ishii’s contributions will undoubtedly leave a lasting impact on the industry.

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