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:
May. 27, 1997
Filed:
Aug. 12, 1992
Applicant:
Inventors:
Gill A Pratt, Wellesley, MA (US);
Stephen A Ward, Chestnut Hill, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395553 ;
Abstract
An interface controlling digital communication between synchronous systems of unequal clock frequency. A phase locked loop generates one clock F.sub.m from the other F.sub.n by locking the phase of the two clocks at a beating period. Within the beating period, a precompiled set of valid and invalid communication clock cycles for each direction of communication are scheduled into lookup tables. The lookup tables generate outputs to a Set of registers for communicating data between the systems of unequal clock frequency.