George Francis Opas

Title: George Francis Opas: Innovator in Amplifier Predistortion Technology

Introduction

George Francis Opas, a prolific inventor based in Park Ridge, IL, has made significant contributions to the field of amplifier technology. With an impressive portfolio of 13 patents, Opas has focused her innovations on enhancing the performance of amplifiers through advanced predistortion techniques.

Latest Patents

Among her latest patents, one stands out: a method and apparatus for predistortion training in an amplifier utilizing predistortion. This innovative approach involves collecting a series of envelope errors and averaging them across various amplitude regions. By modifying look-up table (LUT) values based on a curve-fit to these average amplitude values, her method mitigates the challenges typically associated with manipulating individual LUT coefficients. This technique allows for greater efficiency and accuracy in amplifier performance.

Another notable patent is the adaptive predistortion linearization system and method. This patent describes a system that incorporates input path digital-to-analog converters (DACs), error path DACs, and a digital signal processor (DSP) along with a radio frequency (RF) combiner. The DSP employs a look-up table of complex gain coefficient values and generates error signals through vector decomposition calculations. By enabling separate D/A conversions for error path and input signals, this system achieves improved wide-frequency-offset noise performance.

Career Highlights

George Francis Opas is a key figure at Motorola Corporation, where she has developed groundbreaking technologies that push the boundaries of amplifier design and functionality. Her work in predistortion systems has garnered attention and respect within the engineering community.

Collaborations

Opas has collaborated with esteemed colleagues such as Andrew Merritt Khan and Robert Louis Palandech, who have contributed to her endeavors in advancing amplification technologies. Their combined expertise has enriched the development and application of innovative solutions in the field.

Conclusion

With a remarkable track record of patents and a commitment to technological advancement, George Francis Opas stands out as a leading inventor in the area of amplifier predistortion technology. Her contributions continue to shape the landscape of modern electronics, influencing both current and future innovations in the industry.