Programmable sensitivity frequency coincidence detection circuit and method
US7532040B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2007 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Nov 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D13/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency coincidence detection circuit for detecting frequency edges for each of a plurality of periodic digital signals. The circuit generates count indicators for each of the periodic digital signals and compares each of the count indicators to a programmable sensitivity input to determine a coincidence window for the corresponding one of each of the periodic digital signals. The circuit determines a signal coincidence of the coincidence windows. In another embodiment, a frequency coincidence detection method is provided. The method detects frequency edges for each of a plurality of periodic digital signals, generates count indicators for each of the periodic digital signals and compares each of the count indicators to a programmable sensitivity input to determine a coincidence window for the corresponding one of each of the periodic digital signals. The method determines a signal coincidence of the coincidence windows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.