Company Filing History:
Years Active: 1986
Title: Frederic J Hirzel: Innovator in Digital Signal Processing
Introduction
Frederic J Hirzel is a notable inventor based in Cupertino, CA (US). He has made significant contributions to the field of digital signal processing, particularly in the area of Manchester-encoded signals. With a total of 2 patents, Hirzel's work has had a lasting impact on the technology used in data communication.
Latest Patents
Hirzel's latest patents include a method for digital clock recovery from Manchester-encoded signals. This innovative method allows for rapid recovery of the clock using simple digital techniques, making it suitable for inexpensive Manchester-encoding receivers. The process involves monitoring the received Manchester-encoded signal to determine zero-voltage crossings. At each crossing, the frequency of the recovered clock is adjusted based on the timing of the zero-crossing relative to the midpoint of the currently generated clock. This adjustment is achieved through a programmable counter that functions as a phase-locked loop.
Another significant patent by Hirzel is a method for detection of line activity for Manchester-encoded signals. This signal pre-processing method detects valid Manchester-encoded activity on a line carrying data signals. It monitors both positive and negative voltage levels to determine if the received signal exceeds predetermined thresholds. The method ensures that the received signal is validly Manchester-encoded by checking the timing of voltage crossings within a specific interval.
Career Highlights
Frederic J Hirzel is currently employed at Advanced Micro Devices Corporation, where he continues to innovate in the field of digital signal processing. His work has contributed to advancements in data communication technologies, enhancing the efficiency and reliability of signal processing methods.
Collaborations
Hirzel has collaborated with Roy J Levy, a fellow innovator in the field. Their partnership has fostered the development of new techniques and methods that push the boundaries of digital signal processing.
Conclusion
Frederic J Hirzel's contributions to the field of digital signal processing, particularly through his patents, demonstrate his commitment to innovation. His work continues to influence the development of technologies that rely on Manchester-encoded signals.