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. 09, 2007
Filed:
Dec. 18, 2003
Steven K. Sullivan, Beaverton, OR (US);
Raymond L. Veith, Portland, OR (US);
Iwao Akiyama, Shizuoka, JP;
Yasumasa Fujisawa, Kamakura, JP;
Yukio Aizawa, Tokyo, JP;
Steven K. Sullivan, Beaverton, OR (US);
Raymond L. Veith, Portland, OR (US);
Iwao Akiyama, Shizuoka, JP;
Yasumasa Fujisawa, Kamakura, JP;
Yukio Aizawa, Tokyo, JP;
Tektronix, Inc., Beaverton, OR (US);
Abstract
A triggered DDS generator architecture accumulates a phase increment value in response to a DDS clock to generate phase accumulator values for addressing a waveform lookup table which contains a desired output signal. A time measurement circuit determines a time interval between the arrival of a trigger signal and a subsequent cycle of the DDS clock, which time interval is used to either adjust an initial phase accumulator value or delay the DDS clock so that a constant time is maintained between the arrival of the trigger signal and the desired output signal.