Multiplex communications – Wide area network – Packet switching
Patent
1987-04-16
1989-04-25
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
375120, 331 1A, 328 55, H04J 306, H04L 702
Patent
active
048254371
ABSTRACT:
Clock recovery arrangement suitable more specifically for an information transmission system using the TDMA principle in one transmission direction.
A clock recovery arrangement (24, 13) employed in an information transmission system comprised of a central station (1) and remote stations (2, 3, 4, 5, . . . ). Each station has at least one transmitter circuit (11, 21, 23, 31, 41, 51) and one receiver circuit (12, 20, 22, 30, 40, 50). The information components are time-division muliplexed in the direction from the central station to the remote stations and are transmitted in accordance with the TDMA principle in the other direction. The clock signal H of the multiplex direction is used in the TDMA direction to set the frequency of a first phase-locked loop, while a second loop ensures a fast phase reset. This clock recovery arrangement constituted by this dual loop thus satisfies the requirements as regards precision and reduction of the residual jitter.
REFERENCES:
patent: 4498103 (1985-02-01), Aschwanden
patent: 4587661 (1986-05-01), Schiff
patent: 4651026 (1987-03-01), Serfaty et al.
Barschall Anne E.
Briody Thomas A.
Haken Jack E.
Huseman Marianne
Olms Douglas W.
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