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:
Aug. 21, 1990
Filed:
Mar. 17, 1989
Tzafrir Sheffer, Seattle, WA (US);
Eric Drucker, Seattle, WA (US);
John Fluke Mfg. Co., Inc., Everett, WA (US);
Abstract
A coherent direct digital waveform synthesizer, capable of generating a waveform in response to a decimally or other non-binary related reference frequency while obtaining the advantages of the use of a binary radix phase accumulator generating binary addresses for a waveform memory. The interface between these elements include a frequency converter including a voltage controlled oscillator and a further binary radix phase accumulator in the feedback path of a phase locked loop. A binary radix related digital waveform synthesizer may be thus made to produce non-binary related frequency waveforms coherent with a non-binary radix reference frequency source, and of decimal or other non-binary radix related resolution.