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:
Jun. 14, 1994
Filed:
Aug. 12, 1992
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
377 44 ; 377 33 ; 377 37 ; 377 67 ;
Abstract
A counter circuit includes Johnson-type counters of m stages, each counter including a plurality of flip-flops connected in a cascade connection, each flip-flop receiving a clock signal at a respective clock input end. In the constitution, signals at respective output ends of flip-flops in a (k-1)-th stage counter are simultaneously input to respective clock input ends of flip-flops in each counter of a k-th stage and more. As a result, it is possible to obtain a signal having an arbitrary ratio of frequency division with high speed, while relatively simplifying the circuit constitution.