This inventor holds 5 USPTO granted patents. Top assignee: Unisys Corporation. Active years: 1993-1998.
Company Filing History:
Years Active: 1993-1998
Title: Roy E. Greeff: Innovator in Digital Communication Technologies
Introduction
Roy E. Greeff is a notable inventor based in Salt Lake City, UT (US). He has made significant contributions to the field of digital communication technologies, holding a total of 5 patents. His work focuses on enhancing the efficiency and reliability of digital data transmission.
Latest Patents
Among his latest innovations is the Digital/Analog Bit Synchronizer. This high-speed bit synchronizer features a digital phase detector and a digital offset eliminating circuit. The output from the digital offset eliminating circuit is combined with the output of the digital phase detector to address the DC offset voltage caused by unsymmetrical digital data. Additionally, the phase error offset voltage produced at the output of the digital phase detector is linearized, effectively eliminating seeking and jitter at the lock point.
Another significant patent is the Offset Quadrature Phase Shift Keyed Modulation Circuit. This improved modulator circuit includes a non-linear amplifier in the transmitter and a frequency select logic circuit. The circuit receives in-phase and quadrature phase digital data to modulate onto a carrier frequency signal. The output from the frequency select circuit generates select signals that are sent to a digital carrier frequency generator. This generator synthesizes the carrier frequency based on the input data, ensuring a constant vector power magnitude during phase changes.
Career Highlights
Roy E. Greeff has had a distinguished career, working at Unisys Corporation, where he has been able to apply his innovative ideas in practical applications. His contributions have significantly advanced the field of digital communication.
Collaborations
Throughout his career, Greeff has collaborated with notable colleagues, including Bruce H. Williams and Glenn A. Arbanas. These collaborations have further enriched his work and expanded the impact of his inventions.
Conclusion
Roy E. Greeff is a prominent figure in the realm of digital communication technologies. His innovative patents and contributions continue to influence the industry, showcasing his dedication to advancing technology.