Company Filing History:
Years Active: 1983-1990
Title: Innovations of John Lewis
Introduction
John Lewis is an accomplished inventor based in Tigard, Oregon. He has made significant contributions to the field of technology, particularly in the area of analog to digital conversion and memory mapping systems. With a total of two patents to his name, Lewis has demonstrated his expertise and innovative spirit in his work.
Latest Patents
One of John Lewis's latest patents is the "Autocalibrated Multistage A/D Converter." This invention is designed to maintain appropriate error correction levels for each stage of the converter during operation, thereby minimizing quantization errors. The converter derives an error signal from its digital output based on the slope of the input analog signal. This signal is then fed back to a calibration control circuit, which generates individual error correction levels for various devices within the converter. This innovation addresses variations caused by age, temperature, or other environmental factors, ensuring optimal performance.
Another notable patent is the "Memory Mapping System." This circuit enhances the performance of a random-access-memory-based memory expansion system. By adding memory capacity and a control register to the traditional memory mapping circuit, it allows for the simultaneous storage of several maps. The circuit output can be switched from one stored map to another based on data present at the control register outputs. This innovation significantly reduces delays caused by map changes, improving overall efficiency.
Career Highlights
John Lewis is currently employed at Tektronix, Inc., where he continues to develop and refine his innovative ideas. His work at Tektronix has allowed him to contribute to advancements in technology that have a lasting impact on the industry.
Collaborations
Throughout his career, Lewis has collaborated with notable colleagues, including John D Polonio and Bruce J Penney. These collaborations have fostered a creative environment that encourages the exchange of ideas and the development of groundbreaking technologies.
Conclusion
John Lewis is a remarkable inventor whose contributions to technology have been significant. His patents reflect his innovative thinking and dedication to improving electronic systems. As he continues his work at Tektronix, his future innovations are eagerly anticipated.