Radiant energy – Photocells; circuits and apparatus – Signal isolator
Patent
1993-05-27
1995-04-11
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Signal isolator
359136, 359143, H04B 900
Patent
active
054060915
ABSTRACT:
An optical isolator for use in an electrically powered vehicle for interfacing between a signal processing system having a first ground and a power conversion system, which is operated responsive to control signals from the signal processing system, having a second ground that varies in potential from the first ground. A bi-directional digital communications network is provided having a first node coupled to the signal processing system for generating and receiving digital messages with respect to the first ground, and having a second node coupled to the power conversion system for receiving and generating digital messages with respect to the second ground. The bi-directional digital communications network has a unique start signal and a dominant hierarchy that allows bit-wise contention among messages for assuring communication of high priority messages between the first and second nodes within a predetermined minimum time period. The optical isolator is interposed in the communications network between the first and second nodes for transmitting the digital messages therebetween, while electrically isolating the first ground from the second ground, thereby enabling a reliable digital communications system between the first and second nodes without using a common ground system.
REFERENCES:
patent: 4176401 (1979-11-01), Lonberger
patent: 4197471 (1980-04-01), Lackey et al.
patent: 4243890 (1981-01-01), Miller et al.
patent: 4282604 (1981-08-01), Jefferson
patent: 4420841 (1983-12-01), Dudash
patent: 4435764 (1984-03-01), El-Gohary
patent: 4596048 (1986-06-01), Dunki-Jacobs
patent: 4715031 (1987-12-01), Crawford et al.
patent: 4727535 (1988-02-01), Brandt
patent: 4768202 (1988-08-01), La Croix et al.
patent: 4809257 (1989-02-01), Gantenbein et al.
patent: 4809361 (1989-02-01), Okada et al.
patent: 5144466 (1992-09-01), Nakamura et al.
Bardsley, Jr. David J.
Burba Joseph C.
Allen Stephone B.
Dixon Richard D.
Ford Motor Company
May Roger L.
Nelms David C.
LandOfFree
Communication network optical isolation circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communication network optical isolation circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communication network optical isolation circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1540276