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US 2014/0351468 A1Published application
Backplane Timing Distribution
AssigneeQulsar, Inc.
InventorsKishan Shenoi, Shashi Kumar
Life of this patent
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Abstract
A master and slave module are described that facilitate the distribution of timing, both frequency and phase over a backplane. The method is applicable over any pair of shared transmission medium. The signal transmitted from the master to the slave is suitable for delivering a frequency reference and an approximate phase. The precise phase at the slave is obtained by delaying the 1PPS by a programmable amount estimated by measuring the round-trip delay between the master and slave.
Claims14
A method, comprising:
- intra-network distribution of phase and frequency between different elements of a network including broadcasting a downstream signal on a backplane from a master module to at least one slave module and transmitting an upstream signal on the backplane from the at least one slave module to the master module,.
- wherein broadcasting the downstream signal on the backplane from the master module to the at least one slave module includes using a backplane trace down and
- wherein transmitting the upstream signal on the backplane from the at least one slave module to the master module includes using a backplane trace up.
An apparatus, comprising:
- a backplane phase and frequency alignment system for intra-network distribution of phase and frequency between different elements of a network including
- a backplane that includes a backplane trace down and a backplane trace up;
- a master module coupled to the backplane, the master module broadcasting a downstream signal on the backplane trace down that provides a reference frequency and phase over the backplane;
- and
- at least one slave module coupled to the backplane, the at least one slave module transmitting an upstream signal on the backplane trace up to the master module.
2 more elements
Dependencies are inferred from the claim text.