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:
Oct. 18, 1994
Filed:
Jan. 31, 1994
Applicant:
Inventor:
Hiroshi Yamasaki, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04F / ; G04F / ;
U.S. Cl.
CPC ...
368156 ; 371 61 ; 379279 ;
Abstract
A clock stoppage detector and a selector selection determining circuit are provided on each of a plurality of circuit boards. If any abnormality is detected in the clock selected in accordance with selector control information supplied from a clock selection controller provided common to the plurality of circuit boards, the selector selection determining circuit changes the selection independently of the selection control information. The selector selection determining circuit also performs clock selection independently when failure occurs to the clock selection controller.