Synchronization of digital signals with alternating current
US4961207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Aug 2, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for synchronizing digital signals with alternating current includes a first counter that repetitively starts a first counting sequence at a predetermined phase point in each AC line cycle and effects the sequence at a high frequency rate thereby generating a total count during each line cycle. The total count is then divided by a dividing integer to produce a count number. A second counter repetitively starts a second counting sequence at the predetermined phase point and effects the second sequence at the high frequency rate up to the count number continuously during each line cycle. A decoder responsive to the second counter produces a digital output signal at one or more predetermined points in preselected second counting sequences during each line cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.