Kenji Hamachi

Title: Kenji Hamachi: Innovator in Frequency Measurement and Power Supply Technology

Introduction

Kenji Hamachi is a prominent inventor based in Kyoto, Japan, known for his significant contributions to the fields of frequency measurement and power supply technology. With a total of seven patents to his name, Hamachi has demonstrated a commitment to innovation and excellence in engineering.

Latest Patents

One of his latest inventions is a frequency characteristic measurement apparatus. This apparatus includes a calibration circuit designed to perform a SOLT calibration on cable end surfaces. It features a first measurement circuit that measures S-parameters of a first substrate containing a Device Under Test (DUT) after calibration. Additionally, a second measurement circuit measures S-parameters of a second substrate, also post-calibration. An extraction circuit then performs vector operations on the measurement results to extract S-parameters of the DUT. This innovative design assumes that the reflection of fixtures obtained by virtually dividing the second substrate is equal to or smaller than the reflection on the end surface without division.

Another notable patent is a switch driving device and a switching power supply utilizing the same technology. This device allows for individual zero voltage switching control of two switch elements forming a bidirectional switch. The switching power supply includes a primary winding for alternating-current input and a secondary winding that is electromagnetically coupled. The design enables the direct conversion of alternating-current input voltage into a direct-current output voltage, enhancing efficiency in power supply applications.

Career Highlights

Kenji Hamachi is currently employed at Rohm Co., Ltd., a leading company in semiconductor and electronic components. His work at Rohm has allowed him to push the boundaries of technology and contribute to advancements in electronic measurement and power supply systems.

Collaborations

Throughout his career, Hamachi has collaborated with notable colleagues, including Keiji Iwamoto and Kazuhiro Oguchi. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Kenji Hamachi's contributions to frequency measurement and power supply technology exemplify his dedication to innovation. His patents reflect a deep understanding of engineering principles and a commitment to advancing technology in meaningful ways.