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:
Jul. 02, 1985
Filed:
Jul. 18, 1983
Applicant:
Inventor:
Walter L Zweig, Rockaway, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307510 ; 307 87 ; 307514 ; 307526 ; 307527 ; 307269 ; 328136 ; 328155 ;
Abstract
A digital phase and frequency comparator circuit establishes phase and frequency windows to determine if two AC signals are in phase and of substantially the same frequency. A phase difference between the two signals is determined by exclusively ORing the two signals and timing the duration of a signal state to determine if the phase difference exceeds a threshold. The two AC signals are also ANDed and counted to determine the frequency agreement.
Zweig, Walter. (1985). Digital phase and frequency comparator circuit (U.S. Patent No. 4527080). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4527080
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile