Company Filing History:
2 out of 11 
2 out of 15 Years Active: 1977-1984
Title: Jacques Helle: A Pioneer in Crystal Oscillator Technology
Introduction: Jacques Helle, an accomplished inventor based in Sartrouville, France, has made significant contributions to the field of electronics, particularly in the development of crystal oscillator technology. With a total of four patents under his name, Helle's innovations have paved the way for advancements in frequency control systems.
Latest Patents: Among his latest patents, Helle developed a "Voltage Controlled Crystal Oscillator Having Wide Frequency Range," designed to extend the variation range of a controlled frequency oscillator. This invention utilizes a piezoelectric element in conjunction with a lithium tantalate or lithium niobate element. A linearization circuit, featuring an inductance connected in series with a parallel circuit of a resistor and a capacitor, enhances its performance. Another notable patent is the "Temperature-Compensated Crystal Oscillator." This invention consists of a frequency regulated crystal oscillator that incorporates an oscillating circuit made up of an amplifier, piezoelectric crystal, and voltage-controlled capacitor. Additionally, it features a unique two-part compensating circuit connected to the variable capacitor's terminals, with thermistors that produce complementary signals based on temperature variations.
Career Highlights: Jacques Helle has built his career around innovative electronic designs, holding pivotal positions in various companies. Notably, he has worked with Compagnie d'Électronique et de Piézo-électricité, where he honed his expertise in electronic components, specifically in piezoelectric technology.
Collaborations: Throughout his career, Helle has collaborated with esteemed professionals in the field, including Gerard Charlet and Guy Caret. These partnerships have undoubtedly contributed to the depth and breadth of his inventive work.
Conclusion: Jacques Helle stands out as a notable inventor in the realm of crystal oscillator technology. His latest patents reflect a commitment to improving frequency control mechanisms, with practical applications across various sectors. As the world continues to advance in technology, Helle's contributions will remain an influential part of the electronic landscape.
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