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. 04, 1977
Filed:
Dec. 18, 1974
Richard E Watt, San Diego, CA (US);
Cubic Corporation, San Diego, CA (US);
Abstract
The inherent phase ambiguity that results from the measurement of the phase difference between a reference signal and a data signal having a zero phase relationship is eliminated by adding 360.degree. to phase differences between 0.degree. and 180.degree.. Phase differences between 180.degree. and 360.degree. are measured in the conventional manner. Both the reference signal and the data signal are divided in frequency and the phase difference between the divided signals are compared. The data signal is inhibited for only 180.degree. of the original reference signal to prevent an initial comparing of phase differences between the data signal and the reference signals to establish the proper polarity relationship between the half rate data signal and the half rate reference signal.