Company Filing History:
8 out of 14,087 
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Years Active: 1982-2009
Title: The Innovative Contributions of Gerhard Diefenbach
Introduction
Gerhard Diefenbach, based in Aachen, Germany, is a prolific inventor recognized for his significant innovations in the field of piezoelectric technology. With an impressive portfolio of 12 patents, he has made notable advancements that have the potential to transform various applications in engineering and technology.
Latest Patents
Among his latest contributions is a patent for a **Starting-process controller for starting a piezomotor**. This invention features a voltage-controlled oscillator and a power output stage that works in conjunction with a resonant converter. The oscillator generates control signals critical for the power output stage, while the resonant converter transforms the stepped output voltage into sinusoidal voltage for driving the piezomotor. The patented technology also incorporates a phase comparator that measures the motor current in relation to the drive voltage, enabling efficient operation through a phase-locked loop filter that smooths the signals for controlling the oscillator.
Another significant patent is the **Piezoelectric driving device and a regulation method for a piezoelectric driving device**. This innovation addresses the drop in electric power applied to motors as load increases, which has been a limiting factor in the functionality of existing piezoelectric devices. By regulating the excitation voltage and maintaining a constant current, this invention ensures that effective power remains stable, even under varying loads. Additionally, it includes a feature to limit the current flowing through the piezoelectric resonator to prevent damage.
Career Highlights
Diefenbach has made substantial contributions while working at renowned organizations such as **U.S. Philips Corporation** and **Koninklijke Philips Electronics N.V.** His tenure at these companies has allowed him to refine his skills and innovate in the competitive landscape of technology and engineering.
Collaborations
Throughout his career, Gerhard Diefenbach has collaborated with fellow innovators, including Christian Reichinger and Hugo Schemmann. These partnerships have undoubtedly enriched his work and led to groundbreaking advancements in piezoelectric technologies.
Conclusion
In summary, Gerhard Diefenbach's contributions to the field of piezoelectric technology through his innovative patents reflect his expertise and commitment to advancing engineering practices. His work not only enhances the efficiency and capability of piezomotors but also sets a high standard for future inventions in this vital area of technology.