Company Filing History:
2 out of 3 
1 out of 7 Years Active: 2007
Title: Innovations by Inventor Nelson Roldan
Introduction
Nelson Roldan is an accomplished inventor based in Boca Raton, FL (US). He has made significant contributions to the field of electronics, particularly in the development of advanced attenuator technologies. With a total of 3 patents to his name, Roldan's work showcases his expertise and innovative spirit.
Latest Patents
One of Roldan's latest patents is a voltage-controlled attenuator with no intermodulation distortion. This invention features a design that includes first and second thermistors arranged into a classical Tee, Pi, or Bridged Tee attenuator configuration. It incorporates a heating element, a temperature sensor, and a control circuit. The thermistors, having different temperature coefficients of resistance, are strategically placed near the heating element and temperature sensor. The control circuit monitors the temperature and adjusts the heating element's energy input to maintain the desired temperature, allowing for controlled attenuation while keeping impedance levels stable.
Another notable patent is the temperature and frequency variable gain attenuator. This device combines a temperature variable attenuator with a temperature variable filter network. It utilizes at least three thick film thermistors, with two dedicated to the attenuator and one to the filter network. The unique selection of thermistors ensures that the attenuation changes at a controlled rate with temperature variations, while maintaining acceptable impedance levels. This innovation allows for the creation of various temperature coefficients of resistance by mixing different inks during the thermistor manufacturing process.
Career Highlights
Throughout his career, Nelson Roldan has worked with reputable companies, including Smith Interconnect Microwave Components, Inc. and Smiths Interconnect Microwave Components, Inc. His experience in these organizations has contributed to his development as a leading inventor in his field.
Collaborations
Roldan has collaborated with notable professionals such as Robert J Blacka and Alen Fejzuli. These partnerships have likely enriched his work and led to further advancements in his inventions.
Conclusion
Nelson Roldan's innovative contributions to the field of electronics, particularly in attenuator technology, highlight his expertise and commitment to advancing the industry. His patents reflect a deep understanding of the complexities involved in electronic design and demonstrate his ability to create solutions that meet modern demands.