Company Filing History:
4 out of 2,899 
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1 out of 333 
Years Active: 2008-2018
Title: Hiroyuki Masuko: Innovator in Charging Devices and DC-DC Converters
Introduction
Hiroyuki Masuko is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of charging devices and DC-DC converters. With a total of 7 patents to his name, Masuko's innovations have the potential to enhance the efficiency and performance of electronic devices.
Latest Patents
One of Masuko's latest patents is a **Constant Current Charging Device**. This invention aims to provide a constant current charging device capable of shortening the total charging time of a secondary battery, even when the internal impedance of the battery becomes high. The device includes a charging completion voltage detector, a battery voltage drop detector, an up-down counter, and a constant current generating circuit that adjusts the charging current based on the data from the up-down counter.
Another notable patent is a **DC-DC Converter**. This invention is designed to prevent overshoot in the output voltage, even when the power supply voltage rises from a lower voltage to a normal voltage. The DC-DC converter features a 100% DUTY detection circuit, a power supply voltage rise detection circuit, and a discharge control circuit that lowers the output voltage of an error amplifier when necessary.
Career Highlights
Hiroyuki Masuko has worked with several reputable companies throughout his career. Notably, he has been associated with Seiko Instruments Inc. and Sii Semiconductor Corporation. His experience in these organizations has contributed to his expertise in developing innovative electrical solutions.
Collaborations
Masuko has collaborated with notable colleagues in his field, including Michiyasu Deguchi and Fumiyasu Utsunomiya. These collaborations have likely fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies.
Conclusion
Hiroyuki Masuko is a distinguished inventor whose work in charging devices and DC-DC converters has made a significant impact in the field of electrical engineering. His patents reflect a commitment to innovation and efficiency, paving the way for advancements in technology.