Company Filing History:
Years Active: 2002-2004
Title: Innovations of Jean-François Villemazet
Introduction
Jean-François Villemazet is a notable inventor based in Cintegabelle, France. He has made significant contributions to the field of telecommunications, particularly in the development of devices that enhance the performance of amplifiers. With a total of 2 patents, Villemazet's work focuses on linearization techniques that improve signal integrity in various frequency ranges.
Latest Patents
One of his latest patents is the "Broadband Predistortion Linearizer." This invention relates to a predistortion linearizer for a power amplifier operating in the microwave range. The linearizer includes means for conferring gain and phase predistortion, which compensates for the gain and phase non-linearities of the corresponding amplifier, particularly those of the electronic tube type. The linearizer is characterized by a "linear" first path comprising a Lange coupler, with each of its two accesses grounded via a respective passive element. Additionally, it features a "non-linear" second path that also includes a Lange coupler, with each access grounded via a respective active element. The addition of a transmission line of variable length in at least one of the two paths allows for the adjustment of the (non-constant) frequency response of the linearizer to compensate for the response of the amplifier that is to be linearized.
Another significant patent is the "Broad Frequency Band Linearization Device." This invention pertains to a device for linearizing the gain and phase of an amplifier operating in the UHF range. The gain and phase of the amplifier are linearized by applying a predistortion that compensates for the non-linearities in gain and phase of the corresponding amplifier, notably of the electronic-tube type. The device features a first channel with a series-connected Schottky diode that receives the input signal, a second channel with a parallel-connected Schottky diode that also receives the input signal, and a coupler for phasing the output signals supplied by the first and second channels.
Career Highlights
Jean-François Villemazet is currently associated with Alcatel, a leading telecommunications company. His work at Alcatel has allowed him to contribute to advancements in amplifier technology, particularly in the context of microwave and UHF applications.
Collaborations
Throughout his career, Villemazet has collaborated with notable colleagues such as Pascal