Company Filing History:
Years Active: 1977
Title: DeWitt Paul Smith: Innovator in Telephone Circuitry
Introduction
DeWitt Paul Smith is a notable inventor based in Naperville, Illinois, renowned for his contributions in the field of telecommunications. With a total of two patents to his name, his work has significantly advanced communication technology, particularly in circuit design for telephone systems.
Latest Patents
Smith's latest patents exhibit his profound understanding of communication line interfaces. The first patent, titled "Telephone Subscriber Line Circuit," describes a communication line interface circuit featuring a floating current source. This innovative design supplies a constant current that remains largely independent of loop length, showcasing an efficiency that enhances line supervision and allows for the detection of dial pulse signaling. His second patent, "Telephone Line Battery Feed Circuit," presents a novel circuit for supplying talking current to subscriber subsets while minimizing common mode interference signals. This invention utilizes a differential operational amplifier to maintain a high impedance between the battery and the telephone line for differential voice signals and a low impedance for common mode interference, thus improving signal quality.
Career Highlights
DeWitt Paul Smith has made strides in his career at Bell Telephone Laboratories. The institution is recognized for its pivotal role in telecommunications research and development, providing a backdrop for Smith's groundbreaking work. His innovative approaches to telephone line circuitry and signal processing have defined significant advancements in the industry.
Collaborations
Throughout his career, Smith has collaborated with fellow innovators Irvine Keers Hetherington and Laimons Freimanis. Working alongside these esteemed colleagues has enhanced the depth of research and development efforts within his projects, ultimately contributing to the success of their combined inventions.
Conclusion
DeWitt Paul Smith remains a key figure in the telecommunications field, with patents that not only showcase his inventive prowess but also reflect the evolution of communication technology. His work continues to influence current practices, affirming his legacy as a pioneering inventor in telephone circuitry.