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. 10, 1989
Filed:
Dec. 05, 1986
Applicant:
Inventor:
Karl M Lofgren, Long Beach, CA (US);
Assignee:
Western Digital Corporation, Irvine, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
3072721 ; 307443 ; 307465 ; 307479 ; 307480 ; 307591 ; 307602 ;
Abstract
A flip-flop circuit is provided for use in a phase-locked loop circuit, the flip-flop having two signal paths for selecting a VCO output during velocity lock and phase lock. The two signal paths comprise identical environments and therefore eliminate the phase step exhibited by prior art designs in shifting between velocity lock and phase lock. The circuit is also useful in any application where a clock to output delay of a flip-flop connected for normal operation, must have its propagation delay matched to a circuit which simply delays a signal by the same amount.