Company Filing History:
Years Active: 2009-2010
Title: Ralf-Detlef Schaefer: Innovator in Digital Signal Processing
Introduction
Ralf-Detlef Schaefer is a notable inventor based in Celle, Germany. He has made significant contributions to the field of digital signal processing, particularly in the area of data recovery and electronic circuit design. With a total of 2 patents to his name, Schaefer's work has had a meaningful impact on technology.
Latest Patents
One of Schaefer's latest patents is titled "DSP-based data recovery." This invention involves a bit clock recovery apparatus for digital storage readout that employs sync frames. In this system, an oversampled readout signal is stored in memory, allowing for the identification of sync patterns using digital signal processing techniques. The distances between consecutive sync pattern locations are calculated, enabling the recovery of the bit clock based on these distances and the knowledge of the data framing structure.
Another significant patent is the "Switchable PLL circuit." This electronic circuit features a first and a second phase-locked loop (PLL) stage that can be switched in parallel or in series, depending on the locking status of the first PLL circuit to an input signal. When operating in parallel, only the second PLL circuit actively supplies a clock signal to the output, while the first PLL continues to attempt locking onto the input signal. A lock detector monitors the locking status and adjusts the circuit configuration accordingly.
Career Highlights
Ralf-Detlef Schaefer is currently associated with Thomson Licensing, where he continues to innovate and develop advanced technologies. His expertise in digital signal processing and electronic circuit design has positioned him as a valuable asset in the field.
Collaborations
Throughout his career, Schaefer has collaborated with notable colleagues, including Klaus Gaedke and Friedrich Timmermann. These partnerships have contributed to the advancement of technology and the successful development of innovative solutions.
Conclusion
Ralf-Detlef Schaefer is a distinguished inventor whose work in digital signal processing and electronic circuits has led to significant advancements in technology. His patents reflect his commitment to innovation and his contributions to the field will continue to influence future developments.