This inventor holds 3 USPTO granted patents. Top assignee: Thomson-Csf. Active years: 1981-1985.
Company Filing History:
Years Active: 1981-1985
Title: The Innovations of Charles De Riviere
Introduction
Charles De Riviere is a notable inventor based in Paris, France. He has made significant contributions to the field of telecommunications, particularly in modulation systems. With a total of three patents to his name, De Riviere's work has had a lasting impact on the industry.
Latest Patents
One of his latest patents is a modulating device for a single-sideband modulation system. This innovative device reduces the number of electronic functions required for generating an SSB signal, which is subjected to SSB peak-limiting in a transmitter. The device operates selectively on either the upper or lower channel. By utilizing a mixer, the signal delivered by the peak-limiter is mixed with a signal whose frequency is double that of the local oscillator. The resulting signal is filtered using a symmetrical filter to obtain the signal to be transmitted on one of the channels. The other channel's signal is obtained by reversing the position of the two filters.
Another significant patent is a transmitter-receiver with automatic alternation control. This system supplies a digital preamble for coding speech signal levels prior to each voice activity period. During these periods, high-frequency signals are modulated in substantially constant amplitude, transmitting only the preamble and the speech signals. On reception, a signal detector and logic elements control a switch to ensure that only speech signals are sent to the input of an attenuator. The preamble decoding circuit adjusts the attenuation value to maintain consistent signal levels at the receiver output.
Career Highlights
Charles De Riviere has been associated with Thomson-CSF, a prominent company in the telecommunications sector. His work there has allowed him to develop and refine his innovative ideas, contributing to advancements in communication technology.
Collaborations
Throughout his career, De Riviere has collaborated with notable colleagues such as Pierre Deman and Jean-Claude Ben Sadou. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Charles De Riviere's contributions to the field of telecommunications through his innovative patents have significantly advanced the industry. His work continues to influence modern communication systems, showcasing the importance of innovation in technology.