Location History:
- Chofu, JP (2009 - 2012)
- Tokyo, JP (2012)
Company Filing History:
2 out of 31 
1 out of 91 
1 out of 1 Years Active: 2009-2012
Title: Innovations by Tatsuyoshi Kajikawa
Introduction
Tatsuyoshi Kajikawa is a notable inventor based in Chofu, Japan. He has made significant contributions to the field of digital control systems, particularly in power amplifiers. With a total of 3 patents to his name, his work focuses on enhancing the performance and reliability of electronic devices.
Latest Patents
Kajikawa's latest patents include a digital controller designed to manage output voltage under large variations in load and supply voltage. This innovative digital controller reduces voltage variation compared to conventional models during abrupt changes in load and input. The controller is integrated into a power amplifier, featuring a manipulated variable calculating unit that detects output voltage to compute a manipulated variable. Additionally, it includes a signal generating unit that converts this variable into a signal for the power amplifier's operation. By replacing a feedforward function with a feedback function, the controller achieves a quadratic differential characteristic, significantly improving output voltage stability. Another patent focuses on a digital controller that prevents oscillation while supplying a desired voltage to the load, ensuring robust performance even with long load connecting lines.
Career Highlights
Throughout his career, Kajikawa has worked with prominent organizations such as TDK-Lambda Corporation and the University of Electro-Communications. His experience in these institutions has allowed him to refine his expertise in digital control systems and power electronics.
Collaborations
Kajikawa has collaborated with notable colleagues, including Kouji Higuchi and Kazushi Nakano. Their joint efforts have contributed to advancements in the field of electronic control systems.
Conclusion
Tatsuyoshi Kajikawa's innovative work in digital controllers has significantly impacted the performance of power amplifiers. His patents reflect a commitment to improving electronic device reliability and efficiency.