Company Filing History:
1 out of 34 
1 out of 14 Years Active: 2001-2002
Title: Doug Artman: Innovator in Digital Data Communication
Introduction
Doug Artman is a notable inventor based in San Jose, CA, who has made significant contributions to the field of digital data communication. With a total of 2 patents, his work focuses on synchronizing upstream and downstream communication systems, enhancing the efficiency and reliability of data transmission.
Latest Patents
Artman's latest patents include an innovative apparatus and method for synchronizing an SCDMA upstream to an MCNS downstream, even when the clock rates differ. This bidirectional digital data communication system generates phase coherent upstream clock and carrier signals from a recovered downstream clock, which is generated from a master clock in a central unit. The system is designed to work with any downstream clock rate, provided the two clock rates can be related by the ratio M/N, where M and N are integers. One embodiment of this invention utilizes an MCNS downstream and an SCDMA upstream, employing MNCN timestamp messages to estimate the RU frame offset before establishing frame alignment through a ranging process. The method also incorporates a low jitter technique for inserting timestamp messages, ensuring that MPEG packet headers are not straddled by the sync message. Additionally, clock slip is detected by counting upstream clock cycles over a predetermined downstream clock interval, and the RU transmitter is shut down if slip is detected to prevent ISI interference from misaligned codes. An SCDMA transmitter and receiver for the minislot environment of 802.14 and MCNS are also disclosed in his patents.
Career Highlights
Throughout his career, Doug Artman has worked with prominent companies in the telecommunications sector, including Terayon Communication Systems, Inc. and Terayon Communications Systems, Inc. His expertise in digital communication technologies has positioned him as a key player in the industry.
Collaborations
Artman has collaborated with notable professionals such as Michael Grimwood and Jim Knittel, contributing to advancements in digital data communication.
Conclusion
Doug Artman's innovative work in synchronizing digital communication systems has made a lasting impact on the field. His patents reflect a deep understanding of the complexities involved in data transmission, showcasing his role as a leading inventor in this domain.