James Robert Hamstra

Title: Innovations of James Robert Hamstra

Introduction

James Robert Hamstra is a notable inventor based in Tigard, Oregon. He has made significant contributions to the field of electronics, particularly in power supply systems and EMI attenuation technologies. With a total of 5 patents to his name, Hamstra's work reflects a commitment to enhancing the efficiency and reliability of electronic devices.

Latest Patents

One of Hamstra's latest patents is focused on coordinated power sequencing to limit inrush currents and ensure optimum filtering. This regulated power supply apparatus includes a converter circuit designed to generate a regulated voltage signal from an unregulated voltage signal. The power sequencing circuit is equipped with an unregulated voltage source input terminal, which couples an unregulated voltage signal to the converter circuit. The design incorporates a power limiting circuit and a trigger circuit, utilizing discrete analog components to control switching elements. This innovative approach enhances the performance of DC to DC bus converter circuits, particularly in fan controller applications.

Another significant patent is the air inlet diffuser, which is designed for attachment to an air inlet opening of an electronics enclosure. This diffuser extends into the enclosure, providing an increased surface area for EMI attenuating apertures. By reducing the structure within the air inlet opening, the diffuser minimizes airflow impedance, allowing for improved airflow and EMI attenuation. The design ensures that the total open area of the EMI apertures exceeds that of the air inlet opening, facilitating enhanced performance.

Career Highlights

Throughout his career, James Robert Hamstra has worked with several prominent companies, including Flextronics and PMC-Sierra. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in electronic design and functionality.

Collaborations

Hamstra has collaborated with notable professionals in the field, including Paul Holdredge and Richard Cam. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

James Robert Hamstra's contributions to the field of electronics through his patents and collaborations highlight his innovative spirit and dedication to improving electronic systems. His work continues to influence the industry, paving the way for future advancements.