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:
Aug. 27, 1985
Filed:
Dec. 22, 1983
Applicant:
Inventors:
Ivan L Edwards, West Lafayette, IN (US);
Max S Macrander, Warrenville, IL (US);
Assignee:
GTE Automatic Electric Incorporated, Northlake, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; H04Q / ;
U.S. Cl.
CPC ...
371 61 ; 179 / ; 371-8 ;
Abstract
A clock selection circuit which selects and enables one of a plurality of clock circuits in response to initialization by a processing unit or detection of failure of an on-line clock circuit. The clock circuits are selected on the basis of a priority arrangement. The clock circuit failure is detected by a retriggerable monostable multivibrator and the selection priority is based on time delays generated by programmed counters associated with each clock circuit.