John G Christopher

Title: Innovations of John G Christopher

Introduction

John G Christopher is a notable inventor based in Berkeley, IL (US). He has made significant contributions to the field of electronics, particularly in the development of advanced equalizer networks. With a total of 3 patents to his name, Christopher's work showcases his expertise and innovative spirit.

Latest Patents

One of his latest patents is a Computer Controlled Transversal Equalizer. This invention features an adjustable equalizer network that consists of a series chain of N all-pass amplifier stages driving N+1 scaling circuits. These circuits are connected to a final summing circuit that adjusts the frequency response at M+1 frequency control points. The goal is to achieve a predetermined ripple-free minimum phase shift frequency response over a specified frequency range. The scaling circuits utilize scaling coefficients, determined by Fourier analysis and an appropriate truncation function, to create a filter with a pass band that represents M+1 contiguous bands encompassing the frequency range. The calculation of these coefficients and the control of the scaling circuits are accomplished through digital computation and manipulation. Some embodiments may incorporate passive circuits or linear analogue circuits as scaling circuits, which can be controlled manually or by a computing device.

Career Highlights

John G Christopher is currently associated with Knowles Electronics, Inc., where he continues to innovate and develop cutting-edge technologies. His work has had a significant impact on the audio and electronics industry, enhancing the quality and functionality of sound systems.

Collaborations

Throughout his career, Christopher has collaborated with notable colleagues, including Richard W Peters and John W Staples. These collaborations have contributed to the advancement of technology in their respective fields.

Conclusion

John G Christopher's contributions to the field of electronics, particularly through his innovative patents, highlight his role as a leading inventor. His work continues to influence the development of advanced audio technologies, showcasing the importance of innovation in enhancing user experiences.