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:
Apr. 19, 1988
Filed:
Nov. 12, 1985
Applicant:
Inventors:
George S Des Brisay, Jr, Hemet, CA (US);
Iradj Shahriary, Santa Monica, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
328133 ; 307514 ; 307526 ; 328134 ;
Abstract
A digital phase frequency discriminator is disclosed that eliminates crossover distortion problem inherent in previous discriminator without a corresponding increase in complexity in the circuit. The discriminator includes four cross-coupled RS latches and a reset gate. The reset gate is coupled to the latches such that additional gate delays are provided to ensure that the output signals of the discriminator reach these full logic amplitude and thereby allow for accurate phase frequency discrimination to occur.