Takehito Doi

Title: The Innovative Mind of Takehito Doi: A Journey Through Patents and Contributions

Introduction: Takehito Doi, an accomplished inventor based in Kasugai, Japan, has made significant contributions to the field of electronics through his innovative designs and patents. With a total of 11 patents to his name, Doi has demonstrated a commitment to advancing technology, particularly in power control circuits and electronic devices.

Latest Patents: Among his latest inventions, Doi has notably developed a power control circuit that performs a soft start operation before a power supply device initiates normal operations. This innovative circuit includes a control circuit that manages the initial soft start phase and a counter circuit that divides the switching frequency during normal operations. When the soft start operation lasts for a predefined period, the counter starts dividing the frequency, enhancing performance and reliability.

Another notable patent is his circuit with a variation correction function, designed to achieve output characteristics close to a target value despite manufacturing variances. This invention employs a dummy circuit that mirrors the structure of a correction object capacitor, allowing the difference in phase between an output signal and a reference signal to be detected. This feedback enables adjustment of the capacitance to maintain close adherence to design specifications, regardless of component variations.

Career Highlights: Doi's professional journey has included important roles at Fujitsu Corporation and Fujitsu Semiconductor Limited, where he further honed his expertise in electronic engineering and innovative circuit design. His work has consistently focused on enhancing the reliability and efficiency of electronic devices.

Collaborations: Throughout his career, Takehito Doi has had the privilege of collaborating with talented individuals such as Tetsu Tanizawa and Hideo Tokuda. These partnerships have facilitated the exchange of ideas and fostered an environment of innovation, leading to successful projects and patents.

Conclusion: Takehito Doi stands out as a dedicated inventor whose significant contributions to electronics have paved the way for advancements in power control and circuit design. His innovative patents not only showcase his ingenuity but also reflect his commitment to improving technology for future generations. Through persistent research and collaboration, Doi continues to inspire others in the field and drive innovative solutions in the world of electronics.