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US 2003/0214946 A1Published application
Reference timing architecture
AssigneeBay Microsystems, Inc.
InventorDonald David Shugard
Life of this patent
Estimating the term…
Abstract
A reference timing architecture is disclosed that provides a level of flexibility that was not available with the architecture in the prior art. In particular, the present invention provides for multiple reference timing outputs that can be routed to equipment nodes relying on the timing information, wherein each of the timing processing paths that provide timing outputs can be controlled independently of one another.
Claims30
An apparatus comprising:
- a first selector for receiving a first plurality of candidate waveforms and for selecting a first active waveform from said first plurality of candidate waveforms based on a first selection signal;
- a first signal evaluator for deriving a first evaluation signal based on a characteristic of said first active waveform in comparison to a first threshold;
- a second selector for receiving a second plurality of candidate waveforms and for selecting a second active waveform from said second plurality of candidate waveforms based on a second selection signal;
- a second signal evaluator for deriving a second evaluation signal based on a characteristic of said second active waveform in comparison to a second threshold;
- and
- a controller for deriving said first selection signal based on said first evaluation signal and on an ordering of said first plurality of candidate waveforms, and for deriving said second selection signal based on said second evaluation signal and on an ordering of said second plurality of candidate waveforms;
- wherein a change in the first selection signal by said controller is independent of a change in said second selection signal by said controller;
- and
- wherein said ordering of said first plurality of candidate waveforms is independent of said ordering of said second plurality of candidate waveforms.
6 more elements
An apparatus comprising:
- a first selector for receiving a first plurality of candidate waveforms and for selecting a first active waveform from said first plurality of candidate waveforms based on a first selection signal;
- a first signal evaluator for deriving a first evaluation signal based on a characteristic of said first active waveform in comparison to a first threshold;
- a second selector for receiving a second plurality of candidate waveforms and for selecting a second active waveform from said second plurality of candidate waveforms based on a second selection signal;
- a second signal evaluator for deriving a second evaluation signal based on a characteristic of said second active waveform in comparison to a second threshold;
- and
- a controller for deriving said first selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said first plurality of candidate waveforms, and for deriving said second selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said second plurality of candidate waveforms;
- wherein a change in the first selection signal by said controller is accompanied by a change in said second selection signal by said controller;
- and
- wherein said ordering of said first plurality of candidate waveforms is independent of said ordering of said second plurality of candidate waveforms.
6 more elements
An apparatus comprising:
- a first selector for receiving a plurality of candidate waveforms and for selecting an active waveform from said plurality of candidate waveforms based on a selection signal;
- a first signal evaluator for deriving a first evaluation signal based on a first characteristic of said active waveform in comparison to a first threshold;
- a second selector for receiving said plurality of candidate waveforms and for selecting said active waveform from said plurality of candidate waveforms based on said selection signal;
- a second signal evaluator for deriving a second evaluation signal based on a second characteristic of said active waveform in comparison to a second threshold;
- and
- a controller for deriving said selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said plurality of candidate waveforms.
3 more elements
A method comprising:
- selecting a first active waveform from a first plurality of candidate waveforms based on a first selection signal;
- deriving a first evaluation signal based on a characteristic of said first active waveform in comparison to a first threshold;
- selecting a second active waveform from a second plurality of candidate waveforms based on a second selection signal;
- deriving a second evaluation signal based on a characteristic of said second active waveform in comparison to a second threshold;
- deriving said first selection signal based on said first evaluation signal and on an ordering of said first plurality of candidate waveforms;
- and
- deriving said second selection signal based on said second evaluation signal and on an ordering of said second plurality of candidate waveforms;
- wherein a change in the first selection signal is independent of a change in said second selection signal;
- and
- wherein said ordering of said first plurality of candidate waveforms is independent of said ordering of said second plurality of candidate waveforms.
7 more elements
A method comprising:
- selecting a first active waveform from a first plurality of candidate waveforms based on a first selection signal;
- deriving a first evaluation signal based on a characteristic of said first active waveform in comparison to a first threshold;
- selecting a second active waveform from a second plurality of candidate waveforms based on a second selection signal;
- deriving a second evaluation signal based on a characteristic of said second active waveform in comparison to a second threshold;
- deriving said first selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said first plurality of candidate waveforms;
- and
- deriving said second selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said second plurality of candidate waveforms;
- wherein a change in the first selection signal is accompanied by a change in said second selection signal;
- and
- wherein said ordering of said first plurality of candidate waveforms is independent of said ordering of said second plurality of candidate waveforms.
7 more elements
A method comprising:
- selecting an active waveform from a plurality of candidate waveforms based on a selection signal;
- deriving a first evaluation signal based on a first characteristic of said active waveform in comparison to a first threshold;
- selecting said active waveform from said plurality of candidate waveforms based on said selection signal;
- deriving a second evaluation signal based on a second characteristic of said active waveform in comparison to a second threshold;
- and
- deriving said selection signal based on said first evaluation signal, said second evaluation signal, and on an ordering of said plurality of candidate waveforms.
3 more elements
Dependencies are inferred from the claim text.