This inventor holds 4 USPTO granted patents. Top assignees: At&t Bell Laboratories, Agere Systems Inc., Lucent Technologies Inc.. Active years: 1985-2006.
Company Filing History:
2 out of 3,345 
1 out of 2,316 
1 out of 9,364 
Years Active: 1985-2006
Title: Innovations of James P. Moffatt
Introduction
James P. Moffatt is a notable inventor based in Salem, NH (US). He has made significant contributions to the field of technology, holding a total of 4 patents. His work primarily focuses on adaptive control systems and digital predistortion methods.
Latest Patents
One of his latest patents is titled "Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters." This invention discloses a predistorter that modifies an input signal based on static coefficients representing the non-linear distortion characteristics of an amplifier. The input signal is processed using a non-linear gain parameter that minimizes the error metric between the input signal and a feedback signal. This adaptation occurs when the input voltage exceeds a certain threshold. The processing can involve multiplying the input signal by the non-linear gain parameter, followed by table-coefficient processing, or both. Additionally, the input signal can be adjusted based on a feedback gain parameter to maintain a small-signal gain of approximately unity.
Another significant patent is "Apparatus and method for adaptive control." This invention involves an adaptive controller that generates a sequence of uncorrelated dither signals for various control parameters. Each nominal control signal is combined with the first dither signal value to create control parameter values. Updated control signals are applied in parallel, and performance measures are taken and stored. This process is repeated, yielding a sequence of performance measurements that are correlated with the dither sequences.
Career Highlights
James P. Moffatt has worked with prestigious companies such as AT&T Bell Laboratories and Agere Systems Inc. His experience in these organizations has contributed to his expertise in developing innovative technologies.
Collaborations
Throughout his career, Moffatt has collaborated with notable individuals, including Donald R. Green, Jr. and Gerald L. Frazer. These collaborations have likely enriched his work and led to further advancements in his field.
Conclusion
James P. Moffatt is a distinguished inventor whose work in adaptive control systems and digital predistortion has made a significant impact in technology. His contributions continue to influence the industry and inspire future innovations.