Self initializing phase locked loop ring communications system

Details Self initializing phase locked loop ring communications system Self initializing phase locked loop ring communications system

1984-02-10

1985-08-20

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370103, H04J 300, H04J 306

Patent

active

045368767

ABSTRACT:
A communications network including a plurality of terminals coupled together to provide a unidirectional communications ring. Each of the terminals is coupled in series along the ring. Each terminal is adapted to transmit (at an associated data rate) a digital signal to the next downstream terminal on the ring. Each terminal is adapted to receive a digital signal at the data rate associated with the next upstream terminal. The received digital signal is applied to a phase locked loop characterized by a hold time which exceeds its lock time. The phase locked loop extracts a local timing signal for re-clocking the received digital signal. The transmission time of N bits is less than the hold time of the phase locked loop. Each terminal monitors the re-clocked signal to identify when same valued consecutive bits are received for a period less than the phase locked loop hold time, and upon such detection to cause that terminal to generate at least one transition.

REFERENCES:
patent: 3302114 (1967-01-01), Hertog
patent: 3597552 (1971-08-01), Goto
patent: 3729586 (1973-04-01), Chow
patent: 3836956 (1974-09-01), Cross
patent: 3898388 (1975-08-01), Goodwin
patent: 3938082 (1976-02-01), Schowe, Jr.
patent: 4002842 (1977-01-01), Meyr et al.
patent: 4042783 (1977-08-01), Gindi
patent: 4064486 (1977-12-01), Faber
patent: 4302831 (1981-11-01), Zemanek

Affiliated with

Also associated with

Rating

Self initializing phase locked loop ring communications system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self initializing phase locked loop ring communications system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self initializing phase locked loop ring communications system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-564499