Bounding box signal detector
US7257173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Apr 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31937
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A description of signal behavior in the vicinity of a time and voltage of interest is produced by defining a region in the (time, voltage) plane that is a closed straight sided figure whose vertices are identified by threshold crossings offset for the voltage of interest and clocked by time delays offset from a clock time of interest. A first set of latches clocked by the time delays accumulates the state of signal behavior relative to the threshold voltages as it occurs, and their contents are subsequently transferred to a second set of latches at the start of a new clock cycle, allowing a new accumulation to begin and also allowing a detection logic circuit to operate on a unified and completed collection of indicators of what the just concluded description amounts to. The detection logic circuit responds to the combinations of latched indications to produce a signal corresponding to that description. The closed figure need not be a rectangle, and it may also serve as an indication that a signal went into a region that it should not have, e.g., an eye violation detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.