Company Filing History:
Years Active: 1982-1989
Title: Innovations of Fred D Johnson
Introduction
Fred D Johnson is a notable inventor based in Evanston, IL (US). He has made significant contributions to the field of electronics, particularly in video output technology. With a total of six patents to his name, Johnson's work has had a lasting impact on the industry.
Latest Patents
One of his latest patents is the "Anti-flaring video output amplifier circuit and technique." This invention provides an RGB video output drive amplifier equipped with current limiting circuitry at the base of the driver circuit. The design includes a drive transistor with associated biasing circuits, ensuring that excess current is shunted away from the base of the transistor. This prevents the drive transistor from reaching its saturation mode, thereby eliminating flaring in video displays. The invention optimizes detail in the resulting picture while minimizing additional capacitance in the output circuitry.
Another significant patent is the "Amplifier having reduced power dissipation and improved slew rate." This integratable amplifier is designed to develop a high-level output signal while reducing power dissipation. It features a first circuit that responds to input signals to create first and second signal currents. These currents are then processed by a second circuit to establish a third signal current, which mirrors the first. The design includes a negative feedback path to stabilize the amplifier's gain, enhancing its overall performance.
Career Highlights
Throughout his career, Fred D Johnson has worked with prominent companies such as Zenith Radio Corporation and Zenith Electronics Corporation. His experience in these organizations has contributed to his expertise in developing innovative electronic solutions.
Collaborations
Johnson has collaborated with notable individuals in the field, including Michael D Flasza and George J Tzakis. These partnerships have likely enriched his work and led to further advancements in technology.
Conclusion
Fred D Johnson's contributions to the field of electronics through his innovative patents demonstrate his expertise and commitment to advancing technology. His work continues to influence the industry, showcasing the importance of innovation in electronics.