Company Filing History:
Years Active: 1989-1990
Title: Gilbert Petitjean: Innovator in Variable Attenuation Devices
Introduction
Gilbert Petitjean is a notable inventor based in Igny, France. He has made significant contributions to the field of electronics, particularly in the development of variable attenuation devices. With a total of 3 patents to his name, Petitjean's work has had a meaningful impact on technology.
Latest Patents
One of Petitjean's latest patents is a variable attenuation device intended to be inserted between a transmitter circuit having a certain internal impedance and a load circuit. This device is composed of at least one parallel attenuation branch made up of a variable resistance component, such as a p-i-n diode, and a bias circuit to vary the resistance of the component based on an attenuation control variable. The parallel attenuation branch includes a limiting component connected in series with the variable resistance component, ensuring the matching of the internal impedance of the transmitter circuit.
Another significant patent is an encoding device for multiple consecutive position detection. This device is designed to mark the position of a control knob, featuring several terminals corresponding to different positions. The application of a DC voltage at each instant to one terminal indicates the presence of the knob in the corresponding position. The device incorporates a series of operational amplifiers with specified gain, each amplifier connected to a terminal and a detection circuit to monitor transitions that exceed a specified threshold.
Career Highlights
Gilbert Petitjean is currently associated with U.S. Philips Corporation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing electronic devices and systems.
Collaborations
Petitjean has collaborated with notable coworkers, including Michel Lebourg and Christian Le Tortorec. Their combined expertise has contributed to the success of various projects and innovations.
Conclusion
Gilbert Petitjean is a distinguished inventor whose work in variable attenuation devices and encoding systems has made a lasting impact on the field of electronics. His contributions continue to influence technological advancements today.