Joel J Christiansen

Title: Innovations of Joel J Christiansen

Introduction

Joel J Christiansen is an accomplished inventor based in Independence, MN (US). He has made significant contributions to the field of integrated circuits and clock signal processing. With a total of 2 patents, his work has had a notable impact on technology.

Latest Patents

One of his latest patents is titled "Delay-locked loop with built-in self-test of phase margin." This invention provides a method and apparatus for measuring the phase margin of a delay-locked loop (DLL). In this system, a reference clock is applied to a reference input of the DLL, and an auxiliary variable delay is incorporated within the DLL. The variable delay is adjusted until the DLL becomes unstable, generating a phase margin output based on the value of the variable delay at which instability occurs.

Another significant patent is "System for measuring phase error between two clocks by using a plurality of phase latches with different respective delays." This phase error measurement circuit is designed for measuring the phase error between two clocks on an integrated circuit. It includes first and second clock signal inputs, a phase lead detector, a phase lag detector, and a phase error measurement output. The phase lead detector features a phase lead latch that is coupled to the first clock signal input, while the phase lag detector includes a phase lag latch coupled to the second clock signal input. The output is formed by the data outputs of both latches.

Career Highlights

Joel J Christiansen has worked at LSI Logic Corporation, where he has been able to apply his innovative ideas and technical expertise. His contributions have helped advance the company's capabilities in integrated circuit design and functionality.

Collaborations

Throughout his career, Joel has collaborated with notable colleagues, including Dayanand K Reddy and Ian MacPherson Flanagan. These collaborations have fostered an environment of innovation and creativity, leading to the development of cutting-edge technologies.

Conclusion

Joel J Christiansen is a prominent inventor whose work in integrated circuits and clock signal processing has led to valuable patents. His contributions continue to influence the field and inspire future innovations.