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:
May. 27, 2008
Filed:
May. 24, 2005
Applicant:
Dan Onu, Redmond, WA (US);
Inventor:
Dan Onu, Redmond, WA (US);
Assignee:
Tektronix, Inc., Beaverton, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 13/02 (2006.01); G01R 13/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus for determining the period Tof a signal representing a digitally modulated waveform using NRZ coding with a discrete/integer number of a clock periods between signal transitions, where a periodic sequence of logic '1s' and logic '0s' is transmitted. The method samples an input periodic signal, constructs an estimate of the autocorrelation sequence rof the sequence of samples, constructs a sequence of peaks p, and computes the period Tto be the time between the first psample (k=0), and the time location of the maximum value of pbased on the known Tspacing of the psequence samples.