Daniel Willaim Johnson

Title: Innovations of Daniel William Johnson

Introduction

Daniel William Johnson is an accomplished inventor based in Round Rock, TX (US). He has made significant contributions to the field of technology, particularly in the areas of adapter card detection and clock source reliability. With a total of 2 patents to his name, Johnson's work has had a notable impact on the industry.

Latest Patents

Johnson's latest patents include a "Method and system for detecting the presence of adapter cards" and a "Reliable clock source having a plurality of redundant oscillators." The first patent describes a method and apparatus for detecting the presence or absence of adapter cards, such as memory modules. This innovative approach utilizes adapter cards with wrap-around pins for coupling grounds, which are then used by a Ground Detection Circuit. This circuit combines various signals from the memory modules to indicate when one or more adapter cards are missing by using a default value resulting from the absence of ground.

The second patent focuses on a phase lock loop circuit (PLL) that is integrated into very large scale integrated circuits (VLSI) requiring clock pulses. To enhance reliability, three crystal oscillators are mounted on the printed circuit board (PC) to provide redundancy. A circuit is designed to compare oscillator frequencies and detect discrepancies, ensuring that only clock pulses from properly functioning crystal oscillators are passed to the rest of the PC.

Career Highlights

Johnson is currently employed at International Business Machines Corporation (IBM), where he continues to innovate and contribute to technological advancements. His work at IBM has allowed him to explore various aspects of circuit design and reliability.

Collaborations

Throughout his career, Johnson has collaborated with notable colleagues, including Douglas E. Gill and Paul William Coteus. These collaborations have further enriched his work and contributed to the success of his projects.

Conclusion

Daniel William Johnson is a prominent inventor whose contributions to technology have been recognized through his patents. His innovative methods for detecting adapter cards and ensuring clock source reliability demonstrate his commitment to advancing the field. Johnson's work continues to influence the industry, and his collaborations with esteemed colleagues further enhance his impact.