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:
Sep. 20, 1983
Filed:
Jun. 30, 1980
Applicant:
Inventor:
Donald C Flemming, Rhinebeck, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ; H03K / ;
U.S. Cl.
CPC ...
328 72 ; 328155 ; 364900 ;
Abstract
Two systems of synchronous logic with dissimilar maximum clocking rate requirements use a single oscillating source to derive pseudo synchronous logic related clock signals having desired mutual properties. The periods of the clock T.sub.1 and T.sub.2 form the relationship ##EQU1## where S is a rational number and .alpha. is a largest denominator of T.sub.1 and T.sub.2. .alpha. then can be used to define a window that permits the transfer of data pulses from one of the systems to another without metastable conditions occurring in latch circuits.