This inventor holds 49 USPTO granted patents, primarily in Power Supply Circuits. Top assignees: Sony Corporation, Sony Semiconductor Solutions Corporation, Tokyo Shibaura Electric Co., Ltd.. Active years: 1978-2025.
Location History:
- Kawasaki, JA (1978)
- Yokohama, JA (1978)
- Yokohama, JP (1978 - 1985)
- Kanagawa, JP (1985 - 2022)
Company Filing History:
37 out of 58,144Â 
5 out of 3,263Â 
5 out of 681Â 
Years Active: 1978-2025
Areas of Expertise:
Title: **Masayuki Katakura: A Pioneer in Amplifier and Power Supply Innovations**
Introduction
Masayuki Katakura, a prominent inventor based in Kanagawa, Japan, has made significant contributions to the field of electronics, particularly in the design of amplifiers and power supply circuits. With an impressive portfolio of 48 patents, his work continues to influence modern electronic systems.
Latest Patents
Among his latest innovations is a novel amplifier. This amplifier features a first transistor with a gate terminal for input signals, enabling a current to flow that corresponds to the applied signals. Additionally, it incorporates a second transistor whose gate terminal is linked to a load section, with its current flow based on the voltage change of the first transistor's drain terminal. The synergistic interaction between these transistors is enhanced through a common connection to a first resistance, where both currents converge. Furthermore, a third transistor is utilized to supply a current closely matching that of the second transistor, thereby facilitating output from the device's output terminal.
Katakura's ingenuity is also reflected in his work on a sophisticated power supply circuit that includes a charge pump circuit and a feedback circuit. This circuit addresses critical challenges associated with voltage feedback in charge pump designs. It encompasses a constant current source, a MOS transistor element integrated within the feedback loop, and a bias circuit that applies a steady voltage to the MOS transistor's control terminal. The system is efficiently controlled to regulate the constant current flowing through the feedback, ensuring optimal performance.
Career Highlights
Throughout his career, Masayuki Katakura has collaborated with leading companies in the electronics industry, including Sony Corporation and Tokyo Shibaura Electric Co., Ltd. His expertise in electronic engineering and innovative design has positioned him as a significant contributor to various projects, showcasing his passion for advancing technology.
Collaborations
In his professional journey, Katakura has worked alongside esteemed colleagues such as Kenzo Akagiri and Motomi Ookouchi. These collaborations have fostered a stimulating environment for innovation, allowing for the cross-pollination of ideas and experiences that have culminated in successful technological breakthroughs.
Conclusion
Masayuki Katakura's contributions to electronics through his inventions in amplifiers and power supply circuits exemplify the spirit of innovation. With his extensive patent portfolio and collaborative spirit, he continues to inspire future generations of inventors and engineers in the pursuit of groundbreaking advancements in technology.