The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 1990
Filed:
Aug. 02, 1989
Charles M Wittmer, Trumbull, CT (US);
Ronald J Swanson, Pompton Lakes, NJ (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
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.