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:
Jan. 20, 2009
Filed:
Nov. 30, 2005
Jeffrey L. Meckley, Glenville, PA (US);
Thomas P. Mcgrath, Lutherville, MD (US);
William F. Mcclelland, Finksburg, MD (US);
Robert J. Baummer, Jr., Towson, MD (US);
Jeffrey L. Meckley, Glenville, PA (US);
Thomas P. McGrath, Lutherville, MD (US);
William F. McClelland, Finksburg, MD (US);
Robert J. Baummer, Jr., Towson, MD (US);
AAI Corporation, Hunt Valley, MD (US);
Abstract
A phase persistent agile signal source method, apparatus, and/or computer program product provides a direct digital synthesizer (DDS) clock rate, provides a frequency tuning word (FTW) for a desired output frequency, provides a DDS update for a desired DDS update rate, provides an equivalent frequency least significant bit (LSB) for the desired DDS update rate, provides a current phase of an LSB accumulator, and generates a coherent phase of the desired output frequency based on the DDS clock rate, FTW, DDS update rate to the DDS, equivalent LSB for the desired DDS update rate, and current phase of the LSB accumulator. The coherent phase can be the fraction portion of the result obtained from the multiplication of the FTW and the current phase of the LSB accumulator.